Garage
Shop

2003 MINI Cooper

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.

Universal-Fit Audio for 2003 MINI Cooper

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.

Loading...
Filters

We are sorry, no available results!

filter-icon Filters & Sort

Dual 12" 3/4 MDF Sealed Subwoofer Enclosure (Belva MDFD12)

Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

MDFD12 big
Go to item page Right Arrow Icon of Right Arrow

Dual 12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/Polyfil (2.46 cu ft Airspace - 12SQB)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

120
List price $119.99
-17% $99.99

In stock

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

4 Pack of 150 Amp Nickel-Plated MANL Fuse (Belva BMANL150)

Four fuses per order. High quality 150 Amp MANL Fuses

BMANL150 big
Go to item page Right Arrow Icon of Right Arrow

Four fuses per order. High quality 150 Amp MANL Fuses

• 150A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

11
List price $8.99
-56% $3.99

In stock

• 150A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

Belva BAMMD3

Automotive 9-Function Digital Multimeter Tester

BAMMD3 big
Go to item page Right Arrow Icon of Right Arrow

Automotive 9-Function Digital Multimeter Tester

• Features easy-to-read 2-3/4" Digital display
• Updates 2.5 times per second
• Low battery indicator
• Over range indicator
• Includes two 36 in. 18 gauge CCA test leads

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

7
List price $29.99
-67% $9.99

In stock

• Features easy-to-read 2-3/4" Digital display
• Updates 2.5 times per second
• Low battery indicator
• Over range indicator
• Includes two 36 in. 18 gauge CCA test leads

Single 12" Vented MDF Subwoofer Enclosure (Belva 1SV12B)

12-inch Vented Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.8 cu ft airspace 1SV12B)

1SV12B big
Go to item page Right Arrow Icon of Right Arrow

12-inch Vented Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.8 cu ft airspace 1SV12B)

• Single 12" Vented MDF Enclosure
• Holds one 12" subwoofer
• 3/4 MDF (Medium Density Fiberboard) Construction
• Durable black carpeting
• Gold Terminals
• Internal Box Volume: 1.8 cubic ft.

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

123
List price $95.99
-17% $79.99

In stock

Single 12" Sealed MDF Subwoofer Enclosure (Belva MDFS12)

12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.0 cu ft airspace 12SQTC)

MDFS12 big
Go to item page Right Arrow Icon of Right Arrow

12-inch Sealed Car Sub Box Made with 3/4" MDF and lined w/ Polyfil (1.0 cu ft airspace 12SQTC)

• 3/4" Medium Density Fiberboard Construction
• Durable Black Carpeting
• Pre-Lined with Poly-Fil
• Gold Speaker Terminals

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

172
$69.99

In stock

2 Pack of 150 Amp Nickel-Plated ANL Fuse (Belva BANL150)

Two fuses per order. High quality 150 Amp ANL Fuses

BANL150 big
Go to item page Right Arrow Icon of Right Arrow

Two fuses per order. High quality 150 Amp ANL Fuses

• 150A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

13
List price $7.99
-50% $3.99

In stock

• 150A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

Belva BTK106

Six Piece Installer's Panel Removal Installation Tool Kit for Stereo, Speakers and Car Audio Installs

BTK106 big
Go to item page Right Arrow Icon of Right Arrow

Six Piece Installer's Panel Removal Installation Tool Kit for Stereo, Speakers and Car Audio Installs

• Six Piece Installer's Removal Tool Kit
• Durable Nylon Plastic

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

45
List price $19.99
-25% $14.99

In stock

Used from: $10.49

• Six Piece Installer's Removal Tool Kit
• Durable Nylon Plastic

Limited time!

Belva BAHNGM

Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

BAHNGM big
Go to item page Right Arrow Icon of Right Arrow

Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

• Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

Dads & Grads Sale! Save 15% at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

List price $1.99
-50% $0.99

In stock

• Surface Mount Flange for use with BAWPL, BA2USB, BAVTM

Belva 1.0 Farad Capacitor

1.0 Farad Capacitor with Digital Red Display

BB1D big
Go to item page Right Arrow Icon of Right Arrow

1.0 Farad Capacitor with Digital Red Display

• 1.0 Farad Power Capacitor
• Perfect for Systems up to 1000 Watts
• Audible Warning
• Red Voltage Display
• Mounting Brackets Included

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

80
List price $79.99
-51% $38.99

In stock

Used from: $29.99

• 1.0 Farad Power Capacitor
• Perfect for Systems up to 1000 Watts
• Audible Warning
• Red Voltage Display
• Mounting Brackets Included

4 Pack of 100 Amp Nickel-Plated MANL Fuse (Belva BMANL100)

Four fuses per order. High quality 100 Amp MANL Fuses

BMANL100 big
Go to item page Right Arrow Icon of Right Arrow

Four fuses per order. High quality 100 Amp MANL Fuses

• 100A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

17
List price $8.99
-56% $3.99

In stock

• 100A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

Belva BRT438

4 Gauge Ring Terminals, 3/8" Opening with Nickel Plated Brass - 5 Pieces (3 Red & 2 Black)

BRT438 big
Go to item page Right Arrow Icon of Right Arrow

4 Gauge Ring Terminals, 3/8" Opening with Nickel Plated Brass - 5 Pieces (3 Red & 2 Black)

• Ring Terminals
• 3/8" Opening
• 4 Gauge
• 3 Red & 2 Black
• Nickel Plated
• Resealable Polybag

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

8
List price $9.99
-70% $2.99

In stock

• Ring Terminals
• 3/8" Opening
• 4 Gauge
• 3 Red & 2 Black
• Nickel Plated
• Resealable Polybag

Belva BST408

Pair of 4 Gauge Spade Terminals, #8 Opening with Nickel Plated Brass (1 Black & 1 Red)

BST408 big
Go to item page Right Arrow Icon of Right Arrow

Pair of 4 Gauge Spade Terminals, #8 Opening with Nickel Plated Brass (1 Black & 1 Red)

• Spade Terminals
• 4 Gauge
• 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

7
List price $3.99
-50% $1.99

In stock

• Spade Terminals
• 4 Gauge
• 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

Limited time!

Belva BASB27

27" 500W Weatherproof UTV/ATV/Powersports Bluetooth Soundbar with 8 Speakers and LED Lighting

BASB27 big
Go to item page Right Arrow Icon of Right Arrow

27" 500W Weatherproof UTV/ATV/Powersports Bluetooth Soundbar with 8 Speakers and LED Lighting

• Weatherproof IPX 5 soundbar
• 1" Pair of Horn Loaded Tweeters
• 3" Pairs of Full-Range Speakers
• Built-in Class-D Amplifier
• Adjustable Clamps fit bars from 1.75" to 2"

Dads & Grads Sale! Save 15% at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

8
List price $299.99
-45% $164.99

In stock

Used from: $169.99

• Weatherproof IPX 5 soundbar
• 1" Pair of Horn Loaded Tweeters
• 3" Pairs of Full-Range Speakers
• Built-in Class-D Amplifier
• Adjustable Clamps fit bars from 1.75" to 2"

Belva BST1008

Pair of 10 Gauge Spade Terminals, #8 Opening with Nickel Plated Brass (1 Black & 1 Red)

BST1008 big
Go to item page Right Arrow Icon of Right Arrow

Pair of 10 Gauge Spade Terminals, #8 Opening with Nickel Plated Brass (1 Black & 1 Red)

• Spade Terminals
• 10 Gauge • 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

4
List price $3.99
-50% $1.99

In stock

• Spade Terminals
• 10 Gauge • 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

Belva BCCAP22 (CC2218)

22/18 Gauge Nylon Crimp Cap 100 Pack

BCCAP22 big
Go to item page Right Arrow Icon of Right Arrow

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

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

7
List price $10.99
-55% $4.99

In stock

• 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 BRT0516

1/0 Gauge Ring Terminals, 5/16" Opening with Nickel Plated Brass - 2 Pieces (1 Red & 1 Black)

BRT0516 big
Go to item page Right Arrow Icon of Right Arrow

1/0 Gauge Ring Terminals, 5/16" Opening with Nickel Plated Brass - 2 Pieces (1 Red & 1 Black)

• Ring Terminals
• 5/16" Opening
• 0/1 Gauge
• 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

5
List price $9.99
-50% $4.99

In stock

• Ring Terminals
• 5/16" Opening
• 0/1 Gauge
• 1 Red & 1 Black
• Nickel Plated
• Resealable Polybag

2 Pack of 100 Amp Nickel-Plated ANL Fuse (Belva BANL100)

Two fuses per order. High quality 100 Amp ANL Fuses

BANL100 big
Go to item page Right Arrow Icon of Right Arrow

Two fuses per order. High quality 100 Amp ANL Fuses

• 100A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

8
List price $7.99
-50% $3.99

In stock

• 100A ANL Fuse
• 2 Pack
• Nickel Plated
• Resealable Polybag
• Heavy Duty Construction

Limited time!

Belva BAK44BL

4 Gauge Premium (CCA) Copper Clad Aluminum Complete 4-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 1200 Watts - BLUE

BAK44BL big
Go to item page Right Arrow Icon of Right Arrow

4 Gauge Premium (CCA) Copper Clad Aluminum Complete 4-Channel Amplifier Wiring Kit with RCA for Amplifiers up to 1200 Watts - BLUE

• Complete 4 Gauge Amplifier Installation Kit
• For Amplifiers Up To 1200 Watts RMS
• Premium (CCA) Copper Clad Aluminum
• Helical Twist 4-Channel RCA Cable
• ANL/Mini-ANL Fuse Holder with 80 amp fuse
• Complies to American Wire Gauge standards

FREE Belva Amp Kit at Checkout!
shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

28
List price $79.99
-38% $49.99

In stock

4 Pack of 125 Amp Nickel-Plated MANL Fuse (Belva BMANL125)

Four fuses per order. High quality 125 Amp MANL Fuses

BMANL125 big
Go to item page Right Arrow Icon of Right Arrow

Four fuses per order. High quality 125 Amp MANL Fuses

• 125A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

shipping truck icon Free shipping in USA. Provide zip for delivery date.

Universal Icon Universal – fits most vehicles.

Shop similar products or Update vehicle

12
List price $8.99
-56% $3.99

In stock

• 125A MANL Fuse (4 Pack)
• Nickel Plated for Better Power Transfer
• Resealable Polybag
• Heavy Duty Construction

Belva BBTR1 Pioneer, Clarion and Jensen Navigation Video Bypass

Video In Motion Bypass Module for select 2013-2017 Pioneer/Clarion/Jensen Stereos

BBTR1 big
Go to item page Right Arrow Icon of Right Arrow

Video In Motion Bypass Module for select 2013-2017 Pioneer/Clarion/Jensen Stereos

•Video In Motion Bypass Module for select 2013-2017 Pioneer/Clarion/Jensen Radios
• Auto Parking Brake Bypass Interface
• Simple 3-Wire Installation
• Will Work w/Future Software Updates

shipping truck icon Free shipping in USA. Provide zip for delivery date.
Universal Icon
Universal – fits most vehicles.
Shop similar products or Update vehicle
28
List price $14.99
-47% $7.99

In stock

•Video In Motion Bypass Module for select 2013-2017 Pioneer/Clarion/Jensen Radios
• Auto Parking Brake Bypass Interface
• Simple 3-Wire Installation
• Will Work w/Future Software Updates

Items per page: 20 40 60

    Clear all
    why-shoping-with-sonic

    We love people and we're ready to help you! See what separates us from our competition.

    Take advantage of our VIP rewards like 10% back on your purchases, free 2-day shipping, extended warranties, and free returns! Gain access to all of these rewards without any membership fees.
    Get great discounted (and possibly FREE) installation accessories with most car stereo purchases. This includes dash kits, wiring harnesses and antenna adapters that you will need to properly install your new car stereo.
    We are an Authorized Dealer for all the brands we sell, including the most premium brands in car and marine audio such as Hertz, JL Audio, NVX, Rockford Fosgate, Kicker, Alpine, Kenwood and many more.
    Shop Deals and get up to 30% off premium brands! Shop Now! We are always looking out for the best products and deals to offer our customers. Don’t pay too much by shopping elsewhere!
    We have information on brands, gear, and more for you to explore! Check out our YouTube Channel for helpful how-to videos, product reviews, and Q&As. For a more detailed look, also visit our Learning Center!
    Our trained experts are here to assist you! They are just a phone call or click away to help you get the right gear for you and your vehicle!
    Why Shop With Us?
    FAQ for Universal-Fit Audio & Electronics in 2003 Cooper

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2003 MINI Cooper?

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

    Save up to 10 different vehicles in your garage
    Vehicle
    Store
    Delete

    1983 Ford LTD

    2006 Ford Focus ZX4

    2000 Mazda Millenia

    2003 MINI Cooper

    1987 Ford B700

    2000 Chrysler Cirrus

    1986 Dodge Conquest

    1993 BMW 740i

    1982 Datsun 720

    2002 Acura RL

    Vehicle
    Store
    Delete

    2003 Harley Davidson FXSTD/I Softail Deuce

    Add vehicle Clear all vehicles
    Where to find vehicle info
    Are you sure you want to clear your garage?
    This action cannot be undone. Confirm
    This category was not designed for products.
    If you continue, you will be redirected to a category customized for your vehicle. Continue
    Loading...
    Identify your vehicle and submodel details
    • Owner's manual
    • Vehicle's insurance card
    • Vehicle registration
    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
    Car Info Side Door Icon
    Vehicle Registration Icon
    Vehicle Insurance Icon

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

    • You see only parts engineered for your exact vehicle
    • You avoid incompatible radios, speakers, or wiring
    • Installation is smoother, faster, and frustration-free
    • You get the correct accessories the first time

    Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.