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2018 BMW X3

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Universal gear includes car amplifiers, subs, and other products that do not install in a specific location or require fitment to integrate with a vehicle.

Overview Upgrade your Speakers Add a Subwoofer Add an Amplifier Digital Sound Processors Audio Installation & Accessories Add a Backup Camera Dads & Grads Sale

Universal-Fit Audio for 2018 BMW X3

When thinking of universal gear, we consider products like a car amp that gives more power to your speakers or subs, cell phone chargers, equalizers and sound processors, rear-seat entertainment and video monitors, as well as dash cameras.

Better sound with your factory radio

Better sound with a factory radio

Love your factory look or can't replace the stereo? We got you covered.

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Multi-camera and DVR systems (1)
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Price Range
Connector Type
There are many different ways to connect wires together. Often times when doing your own installation, you will be in need of specific types of connectors. This is the specific type of connector or terminal that is included with this item.

Bullet and Butt connectors are used to connect to wires together. Butt connectors are often used when installing an aftermarket headunit to the factory harness.

Quick Disconnect Connectors are used primarily in head unit or speaker applications. They provide a simple and easy way to connect or disconnect your wire.

Quick Splice Adapters and T-Tap Connectors can quickly tap a wire to already connected wire.

Relays, Relay Sockets and Switches are used for electronic applications such as car alarm installations and other audio applications.

Ring and Spade Terminals connect wires to a terminal. These are mainly used in battery hook-up, amplifier connection, speaker connection, and other various installation applications.
Connection Gender
This is the gender of the connector. Usually a specific type of connector will have both male and female connectors.

Please make sure that you order the correct gender of connector that is required for your installation.
Maximum Input Gauge Size
This is the largest gauge wire that will fit into the power and ground terminals of this device. The lower the gauge number, the thicker the wire is. For example, a 4 gauge wire is thicker than an 8 gauge wire and thus has higher current carrying capacity. Always do your best to get this size wire to reduce the risk of damage to your components.
Primary Color
This is the main color of the item.
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NVX XWF04PK

4 pack 1/0 AWG Ferrule with NVX heat shrink

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NVX XWF04PK

4 pack 1/0 AWG Ferrule with NVX heat shrink

• Prevents Wire Splitting when using Setscrew Terminals
• Fits 1/0 Gauge AWG Wire
• Includes (4) 0 Gauge Ferrules and (4) Heat Shrink

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List price $9.99
-10% $8.99

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Like New from: $7.64

• Prevents Wire Splitting when using Setscrew Terminals
• Fits 1/0 Gauge AWG Wire
• Includes (4) 0 Gauge Ferrules and (4) Heat Shrink

NVX XRTC4

4 Gauge Solid Copper Ring Terminals with Shrink Tubing - 4 Pack

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NVX XRTC4

4 Gauge Solid Copper Ring Terminals with Shrink Tubing - 4 Pack

• 4 Gauge Solid Copper Ring Terminals
• Shrink Tubing
• Pure Copper with Nickel plating for optimal Current transfer
• Color: Black
• Count: 4

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• 4 Gauge Solid Copper Ring Terminals
• Shrink Tubing
• Pure Copper with Nickel plating for optimal Current transfer
• Color: Black
• Count: 4

Stinger SPT521

Gauge Reducer, 1/0 Gauge Input to 4 Gauge Pin

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Stinger SPT521

Gauge Reducer, 1/0 Gauge Input to 4 Gauge Pin

• Gauge Reducer Adapter
• 1/0 Gauge Input to 4 Gauge Pin
• Deep Wire Recesses
• Ultimate Power Delivery
• Corrosion Resistant Shoc-Krome Plating

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List price $29.00
-55% $12.99

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• Gauge Reducer Adapter
• 1/0 Gauge Input to 4 Gauge Pin
• Deep Wire Recesses
• Ultimate Power Delivery
• Corrosion Resistant Shoc-Krome Plating

NVX XQDC4

4 AWG High Current Power and Ground Quick Disconnect with Surface Mounts

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NVX XQDC4

4 AWG High Current Power and Ground Quick Disconnect with Surface Mounts

• 4 AWG Power, Ground and Remote Quick Disconnect
• Rated up to 120 Amps
• Anderson connectors
• Makes it easy to remove amps, batteries and other equipment quickly
• Includes male and female quick disconnects

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-7% $25.99

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Used from: $15.59 Like New from: $22.09

• 4 AWG Power, Ground and Remote Quick Disconnect
• Rated up to 120 Amps
• Anderson connectors
• Makes it easy to remove amps, batteries and other equipment quickly
• Includes male and female quick disconnects

Stinger SPT5503

PRO Series Classic Banana Plug Dual Terminal w/ Shoc-Krome Plating and Black Plastic Clip (1/pack)

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Stinger SPT5503

PRO Series Classic Banana Plug Dual Terminal w/ Shoc-Krome Plating and Black Plastic Clip (1/pack)

• Accepts Up To 8 Gauge
• Dual Red Molded Design
• Compression Style Connection
• Expandable Quick Connection
• Shoc-Krome Plating

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• Accepts Up To 8 Gauge
• Dual Red Molded Design
• Compression Style Connection
• Expandable Quick Connection
• Shoc-Krome Plating

Belva BCCAP22 (CC2218)

22/18 Gauge Nylon Crimp Cap 100 Pack

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Belva BCCAP22 (CC2218)

22/18 Gauge Nylon Crimp Cap 100 Pack

• 22/18 Gauge Nylon Crimp Cap
• Heat shrinkable Design
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires
• Gauge: 22/18
• Color: Clear
• Count: 100

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List price $10.99
-55% $4.99

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• 22/18 Gauge Nylon Crimp Cap
• Heat shrinkable Design
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires
• Gauge: 22/18
• Color: Clear
• Count: 100

Belva BCC2218

22/18 Gauge Nylon Crimp Caps, 25/pack

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Belva BCC2218

22/18 Gauge Nylon Crimp Caps, 25/pack

• 22/18 Gauge Nylon Crimp Cap
• Heat shrinkable Design
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires
• Gauge: 22/18
• Color: Clear
• Count: 25

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4
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-50% $3.99

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• 22/18 Gauge Nylon Crimp Cap
• Heat shrinkable Design
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires
• Gauge: 22/18
• Color: Clear
• Count: 25

Stinger SPT5124

PRO Series 4 AWG Spade Terminals w/ #8 Openings & ShocKrome Plating

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Stinger SPT5124

PRO Series 4 AWG Spade Terminals w/ #8 Openings & ShocKrome Plating

• Solid Brass allows for maximum power transfer
• 8 Gauge opening
• Crimp-on style
• Ideal for many car audio applications

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• Solid Brass allows for maximum power transfer
• 8 Gauge opening
• Crimp-on style
• Ideal for many car audio applications

Stinger SPT5210

Pro Classic 1/0 GA Input Output Shoc-Krome

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Stinger SPT5210

Pro Classic 1/0 GA Input Output Shoc-Krome

• Power Wire Coupler
• Ultimate Power Delivery
• Corrosion Resistant Shoc-Krome Plating

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• Power Wire Coupler
• Ultimate Power Delivery
• Corrosion Resistant Shoc-Krome Plating

Install Bay 646

Posi-Lock 20-26 AWG Locking Mini Butt Connectors (8-Pack)

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Install Bay 646

Posi-Lock 20-26 AWG Locking Mini Butt Connectors (8-Pack)

• Posi-Lock Mini Butt Connectors
• Locking Twists Prevent Disconnection
• 20-26 AWG
• Package of 8

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$14.99

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• Posi-Lock Mini Butt Connectors
• Locking Twists Prevent Disconnection
• 20-26 AWG
• Package of 8

Install Bay 3MYTT

3M Yellow 12/10 Gauge T-Taps (50 Pieces)

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Install Bay 3MYTT

3M Yellow 12/10 Gauge T-Taps (50 Pieces)

• Bulk Pack of T-Tap Connector
• For 12/10 Gauge (AWG) Wire
• Yellow
• Package of 50

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List price $37.99
-11% $33.99

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• Bulk Pack of T-Tap Connector
• For 12/10 Gauge (AWG) Wire
• Yellow
• Package of 50

Install Bay 3MRTT

3M Red 22/18 Gauge T-Taps

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Install Bay 3MRTT

3M Red 22/18 Gauge T-Taps

• Bulk Pack of T-Tap Connector
• Allows for fast and easy splicing of wires
• Quickly tap into wires and cables
• Designed for tapping into 22/18 Gauge (AWG) wire
• Color: Red

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List price $24.99
-12% $21.99

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• Bulk Pack of T-Tap Connector
• Allows for fast and easy splicing of wires
• Quickly tap into wires and cables
• Designed for tapping into 22/18 Gauge (AWG) wire
• Color: Red

Limited time!

NVX XQDC4 (Open Box, Good)

4 AWG High Current Power and Ground Quick Disconnect with Surface Mounts

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NVX XQDC4 (Open Box, Good)

4 AWG High Current Power and Ground Quick Disconnect with Surface Mounts

• 4 AWG Power, Ground and Remote Quick Disconnect
• Rated up to 120 Amps
• Anderson connectors
• Makes it easy to remove amps, batteries and other equipment quickly
• Includes male and female quick disconnects

10% Off Open Box!
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List price $27.99
-44% $15.59
$14.03 with coupon | Price details

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Only 1 Left!

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• 4 AWG Power, Ground and Remote Quick Disconnect
• Rated up to 120 Amps
• Anderson connectors
• Makes it easy to remove amps, batteries and other equipment quickly
• Includes male and female quick disconnects

Stinger SPT5211

Pro Classic 4 GA Input Output Shoc-Krome Power Wire Coupler

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Stinger SPT5211

Pro Classic 4 GA Input Output Shoc-Krome Power Wire Coupler

• Power Wire Coupler
• Ultimate Power Delivery
• Corrosion Resistant Shoc-Krome Plating

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1
List price $19.00
-47% $9.99

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• Power Wire Coupler
• Ultimate Power Delivery
• Corrosion Resistant Shoc-Krome Plating

Stinger SQD4

4 Ga High Amperage Quick Disconnect

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Stinger SQD4

4 Ga High Amperage Quick Disconnect

• Quick Disconnect
• Up to 4 Gauge Power Wire
• Polarity Identification for Safety

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List price $49.00
-59% $19.95

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• Quick Disconnect
• Up to 4 Gauge Power Wire
• Polarity Identification for Safety

Install Bay 3MRVBC

3M Red 22/18 Gauge Vinyl Butt Connectors

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Install Bay 3MRVBC

3M Red 22/18 Gauge Vinyl Butt Connectors

• Butt Connectors
• 22/18 Gauge
• Color: Red
• Vinyl Insulated
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires

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2
List price $18.99
-11% $16.99

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• Butt Connectors
• 22/18 Gauge
• Color: Red
• Vinyl Insulated
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires

Install Bay 604

Posi-Lock 20-22 AWG Locking T-Tap-Style Connectors (6-Pack)

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Install Bay 604

Posi-Lock 20-22 AWG Locking T-Tap-Style Connectors (6-Pack)

• Posi-Lock T-Tap Style Connectors
• Locking Twists Prevent Disconnection
• 20-22 AWG
• Package of 6

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List price $14.98
-33% $9.99

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• Posi-Lock T-Tap Style Connectors
• Locking Twists Prevent Disconnection
• 20-22 AWG
• Package of 6

Install Bay IBCPLR1

0 AWG to 4 AWG Nickel Plated Gauge Reducer

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Install Bay IBCPLR1

0 AWG to 4 AWG Nickel Plated Gauge Reducer

• Wire Gauge Reducer
• 0 AWG to 4 AWG
• Nickel Plated
• Deep Wire Recesses
• Ultimate Power Delivery

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List price $12.99
-15% $10.99

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• Wire Gauge Reducer
• 0 AWG to 4 AWG
• Nickel Plated
• Deep Wire Recesses
• Ultimate Power Delivery

Belva BHS12Y

12/10 Gauge Yellow Heat Shrink Connectors - 100 Pack

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Belva BHS12Y

12/10 Gauge Yellow Heat Shrink Connectors - 100 Pack

• 12/10 Gauge Heat Shrink Connectors
• Heat shrinkable Design
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires
• Gauge: 12/10
• Color: Yellow
• Count: 100

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List price $69.99
-81% $12.99

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• 12/10 Gauge Heat Shrink Connectors
• Heat shrinkable Design
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires
• Gauge: 12/10
• Color: Yellow
• Count: 100

Stinger SPT5118

PRO Series Spade Terminals 8 Gauge Barrier Spade #8 Opening Shoc-Krome

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Stinger SPT5118

PRO Series Spade Terminals 8 Gauge Barrier Spade #8 Opening Shoc-Krome

• Solid Brass allows for maximum power transfer
• 8 Gauge opening
• Crimp-on style
• Ideal for many car audio applications

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List price $9.00
$8.99

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• Solid Brass allows for maximum power transfer
• 8 Gauge opening
• Crimp-on style
• Ideal for many car audio applications

The Install Bay SB50

8 AWG High Current Power and Ground Quick Disconnect

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The Install Bay SB50

8 AWG High Current Power and Ground Quick Disconnect

•8 AWG Power and Ground Quick Disconnect
• Color is Red
• Makes it easy to remove amps, batteries and other equipment quickly
• Requires 2 pieces to create connection

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List price $11.99
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•8 AWG Power and Ground Quick Disconnect
• Color is Red
• Makes it easy to remove amps, batteries and other equipment quickly
• Requires 2 pieces to create connection

Install Bay IBWTH12

Waterproof Connectors 12 Gauge - Each

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Install Bay IBWTH12

Waterproof Connectors 12 Gauge - Each

• Waterproof Connectors
• 2C Plug in Connector
• Male/Female
• 12 Gauge

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List price $7.99
-13% $6.99

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• Waterproof Connectors
• 2C Plug in Connector
• Male/Female
• 12 Gauge

Crux FAK-RCAF

FAKRA to Female RCA Adaptor

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Crux FAK-RCAF

FAKRA to Female RCA Adaptor

• FAKRA to Female RCA Adaptor
• Color coded connectors
• Plastic housing for added protection
• Complete plug and play connection

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List price $54.60
-36% $35.10

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• FAKRA to Female RCA Adaptor
• Color coded connectors
• Plastic housing for added protection
• Complete plug and play connection

Install Bay IBCPLR2

4 AWG to 8 AWG Nickel Plated Wire Gauge Reducer

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Install Bay IBCPLR2

4 AWG to 8 AWG Nickel Plated Wire Gauge Reducer

• Wire Gauge Reducer
• 4 AWG to 8 AWG
• Nickel Plated
• Deep Wire Recesses
• Ultimate Power Delivery

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List price $12.99
-15% $10.99

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• Wire Gauge Reducer
• 4 AWG to 8 AWG
• Nickel Plated
• Deep Wire Recesses
• Ultimate Power Delivery

Scosche UAKP

Universal Amp KwikPlug 8-Gauge Amplifier Quick Disconnect

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Scosche UAKP

Universal Amp KwikPlug 8-Gauge Amplifier Quick Disconnect

• Accepts up to 8-Gauge
• Power, Ground and Remote Quick Disconnect
• Can be used for Subwoofer Quick Disconnect

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List price $22.43
-33% $14.99

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• Accepts up to 8-Gauge
• Power, Ground and Remote Quick Disconnect
• Can be used for Subwoofer Quick Disconnect

Install Bay BNFD250F

Red Nylon 16/148 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

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Install Bay BNFD250F

Red Nylon 16/148 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

• Blue nylon female quick disconnect terminals
• Connects to male terminals with 0.250 size
• Accepts 16/14 AWG gauge wire
• Package of 100 pieces

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List price $15.99
-13% $13.99
Add to Cart

• Blue nylon female quick disconnect terminals
• Connects to male terminals with 0.250 size
• Accepts 16/14 AWG gauge wire
• Package of 100 pieces

The Install Bay SB175

1/0 AWG High Current Power and Ground Quick Disconnect

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The Install Bay SB175

1/0 AWG High Current Power and Ground Quick Disconnect

• 1/0 AWG Power and Ground Quick Disconnect
• Color Is Yellow
• Makes It Easy To Remove Amps, Batteries And Other Equipment Quickly
• Requires 2 Pieces To Create Connection

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List price $38.99
-10% $34.99

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• 1/0 AWG Power and Ground Quick Disconnect
• Color Is Yellow
• Makes It Easy To Remove Amps, Batteries And Other Equipment Quickly
• Requires 2 Pieces To Create Connection

Install Bay JW4136

18 AWG Male & Female Water-Resistant Speaker Plugs - Pair

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Install Bay JW4136

18 AWG Male & Female Water-Resistant Speaker Plugs - Pair

• Water Resistant Speaker Plugs
• Male and Female Plugs included
• 18 Gauge Input

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List price $25.99
-12% $22.99

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• Water Resistant Speaker Plugs
• Male and Female Plugs included
• 18 Gauge Input

Limited time!

NVX XWF04PK (Like New (Open Box))

4 pack 1/0 AWG Ferrule with NVX heat shrink

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NVX XWF04PK (Like New (Open Box))

4 pack 1/0 AWG Ferrule with NVX heat shrink

• Prevents Wire Splitting when using Setscrew Terminals
• Fits 1/0 Gauge AWG Wire
• Includes (4) 0 Gauge Ferrules and (4) Heat Shrink

10% Off Open Box!
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List price $9.99
-24% $7.64
$6.88 with coupon | Price details

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Only 1 Left!

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• Prevents Wire Splitting when using Setscrew Terminals
• Fits 1/0 Gauge AWG Wire
• Includes (4) 0 Gauge Ferrules and (4) Heat Shrink

Install Bay 3MYVBC

3M Yellow 12/10 Gauge Vinyl Butt Connectors

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Install Bay 3MYVBC

3M Yellow 12/10 Gauge Vinyl Butt Connectors

• Butt Connectors
• 12/10 Gauge
• Color: Yellow
• Vinyl Insulated
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires

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• Butt Connectors
• 12/10 Gauge
• Color: Yellow
• Vinyl Insulated
• Makes Crimping Wires Fast and Easy
• Offers a Solid Connection of Wires

Install Bay 3MBNFD250F

3M Blue 16/14 Gauge 0.250" Fully Insulated Nylon Female Quick Disconnect

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Install Bay 3MBNFD250F

3M Blue 16/14 Gauge 0.250" Fully Insulated Nylon Female Quick Disconnect

• Female Quick Disconnects
• Accepts 16/14 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Blue

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• Female Quick Disconnects
• Accepts 16/14 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Blue

Wet Sounds TC3-S 6-PIN

6-Pin RGB LED Connectors for REV and ICON Swivel Clamp Tower Speakers (Sold as Pair)

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Wet Sounds TC3-S 6-PIN

6-Pin RGB LED Connectors for REV and ICON Swivel Clamp Tower Speakers (Sold as Pair)

• 6-Pin 6-pin RGB LED connector
• Designed for REV and ICON swivel clamp tower speakers (Sold separately)
• Includes a pair of TC3 swivel clamps
• Sold as Pair

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• 6-Pin 6-pin RGB LED connector
• Designed for REV and ICON swivel clamp tower speakers (Sold separately)
• Includes a pair of TC3 swivel clamps
• Sold as Pair

Install Bay RNFD250F

Red Nylon 22/18 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

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Install Bay RNFD250F

Red Nylon 22/18 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

• Red nylon female quick disconnect terminals
• Connects to male terminals with 0.250 size
• Accepts 22/18 AWG gauge wire
• Package of 100 pieces

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• Red nylon female quick disconnect terminals
• Connects to male terminals with 0.250 size
• Accepts 22/18 AWG gauge wire
• Package of 100 pieces

Install Bay 3MBNMD250F

3M Blue 16/14 Gauge 0.250" Fully Insulated Nylon Male Quick Disconnect

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Install Bay 3MBNMD250F

3M Blue 16/14 Gauge 0.250" Fully Insulated Nylon Male Quick Disconnect

• Male Quick Disconnects
• Accepts 16/14 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Blue

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• Male Quick Disconnects
• Accepts 16/14 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Blue

Install Bay 3MBNBG

3M Blue 16/14 Gauge Insul-Grip Seamless Butt Connectors

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Install Bay 3MBNBG

3M Blue 16/14 Gauge Insul-Grip Seamless Butt Connectors

• 100 Pack of Seamless Butt Connectors
• 16/14 Gauge
• Color: Blue
• Makes crimping wires fast and easy
• Offers a solid connection of wires

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$34.99

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• 100 Pack of Seamless Butt Connectors
• 16/14 Gauge
• Color: Blue
• Makes crimping wires fast and easy
• Offers a solid connection of wires

Metra 76-0300

3-Way Universal Waterproof Connector

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Metra 76-0300

3-Way Universal Waterproof Connector

• 3-Way Universal Waterproof Connector
• Radio Wiring Harness
• Quick & Easy Installation
• No Cutting Required
• Universal Compatibility
• Waterproof

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• 3-Way Universal Waterproof Connector
• Radio Wiring Harness
• Quick & Easy Installation
• No Cutting Required
• Universal Compatibility
• Waterproof

Metra 76-0600

6 Way Waterproof Connector

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Metra 76-0600

6 Way Waterproof Connector

• 6-way Universal Waterproof Connector

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• 6-way Universal Waterproof Connector

Install Bay IBWTH16

16 GA Waterproof 2 Conductor Plug-in Connector M/F 1 PC

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Install Bay IBWTH16

16 GA Waterproof 2 Conductor Plug-in Connector M/F 1 PC

• Quickly connect/disconnect applications easily in seconds
• Use this for power/ground and speaker wiring in Car, Marine, Motorcycle or Powersports applications
• Waterproof Connectors
• 2C Plug in Connector
• Male/Female
• 16 Gauge

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List price $6.99
-14% $5.99

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• Quickly connect/disconnect applications easily in seconds
• Use this for power/ground and speaker wiring in Car, Marine, Motorcycle or Powersports applications
• Waterproof Connectors
• 2C Plug in Connector
• Male/Female
• 16 Gauge

Install Bay 3MRNFD250F

3M Red 22/18 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

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Install Bay 3MRNFD250F

3M Red 22/18 Gauge 0.250 Fully Insulated Nylon Female Quick Disconnect

• Female Quick Disconnects
• Accepts 22/18 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Red

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• Female Quick Disconnects
• Accepts 22/18 gauge wire
• Nylon fully insulated
• Comes in pack of 100
• Connector Size: 0.250"
• Color: Red

Limited time!

NVX XQDC4 (Like New (Open Box))

4 AWG High Current Power and Ground Quick Disconnect with Surface Mounts

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NVX XQDC4 (Like New (Open Box))

4 AWG High Current Power and Ground Quick Disconnect with Surface Mounts

• 4 AWG Power, Ground and Remote Quick Disconnect
• Rated up to 120 Amps
• Anderson connectors
• Makes it easy to remove amps, batteries and other equipment quickly
• Includes male and female quick disconnects

10% Off Open Box!
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List price $27.99
-21% $22.09
$19.88 with coupon | Price details

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• 4 AWG Power, Ground and Remote Quick Disconnect
• Rated up to 120 Amps
• Anderson connectors
• Makes it easy to remove amps, batteries and other equipment quickly
• Includes male and female quick disconnects

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    FAQ for Universal-Fit Audio & Electronics in 2018 X3

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2018 BMW X3?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your X3.

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    Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

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