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2008 BMW 550i

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 2008 BMW 550i

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.

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NVX VSPTW

450W Peak (150W RMS) 1" V-Series Silk Dome Tweeters with External Crossovers

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450W Peak (150W RMS) 1" V-Series Silk Dome Tweeters with External Crossovers

• 1" V Series Dome Tweeters
• 225 watts Peak Each
• 75 watts RMS Each
• 4 ohm Impedance

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Install kits available for most vehicles

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Fits multiple locations in your 550i
  • Front Door
  • Rear Deck Corner
29
List price $59.99
-17% $49.99 /pair

In stock

NVX FRING4

Universal 4" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

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Universal 4" Self-Adhesive Foam Speaker Baffle Ring Kit (Pack of 2)

• 4" Self-Adhesive Foam Speaker Baffle Ring Kit
• Waterproof automotive-grade high-density foam strips
• Prevents front and rear wave cancellation and panel vibrations
• Designed for use with 4" speakers
• Pack of 2

2+ offers available
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found car based on your search
Fits your 550i
4
List price $18.99
-37% $11.98

In stock

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Available Offers (2) for NVX FRING4
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List price $18.99
-37% $11.98
$10.18 with coupon | Price details
2026-06-28 23:59:00
Free Speaker Accessory at Checkout!
Used from: $5.39

NVX XBAF8

Universal 8" Waterproof Silicone Rubber Speaker Baffles (Pack of 2)

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Universal 8" Waterproof Silicone Rubber Speaker Baffles (Pack of 2)

• 8" Self-Adhesive Foam Speaker Baffle Ring Kit
• Waterproof foldable silicone baffles with egg crate foam
• Foldable rings allow for perfect fitment at varying depths
• Designed for use with 8" speakers
• Pack of 2

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found car based on your search
Fits your 550i
2
List price $29.99
-23% $22.99

In stock

Used from: $13.99 Like New from: $19.54
Limited time!

NVX XBAF8 (Open Box, Great)

2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

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2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
List price $29.99
-53% $13.99
$12.59 with coupon | Price details

In stock

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime

Limited time!

NVX XBAF8 (Open Box, Good)

2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

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2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
List price $29.99
-33% $19.99
$17.99 with coupon | Price details

In stock

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime

Limited time!

NVX XBAF8 (Like New (Open Box))

2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

XBAF8 big
Go to item page Right Arrow Icon of Right Arrow

2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
List price $29.99
-35% $19.54
$17.59 with coupon | Price details

In stock

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime

Limited time!

NVX FRING4 (Open Box, Good)

2 Piece 4" Self-Adhesive Foam Speaker Ring Baffle Kit

FRING4 big
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2 Piece 4" Self-Adhesive Foam Speaker Ring Baffle Kit

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Easy peel and stick installation

10% Off Open Box!
shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
List price $18.99
-72% $5.39
$4.85 with coupon | Price details

In stock

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Easy peel and stick installation

NVX XBAF8 Baffle Accessory Kit

2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad + 1.38 Square Feet of Sound Damping (Two 10" x 10" Pieces)

XBAF8_SDSK2_BACC_KIT big
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2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad + 1.38 Square Feet of Sound Damping (Two 10" x 10" Pieces)

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime
• Includes Sound Damping

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
50
List price $48.73
-26% $35.99

In stock

NVX XBAF8 Premium Speaker Accessory Kit

2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad + NVX SDBSK2 Premium Sound Damping

XBAF8_SDBSK2_ACC_KIT big
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2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam Base Pad + NVX SDBSK2 Premium Sound Damping

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
50
List price $48.73
-26% $35.99

In stock

NVX FRING4 Basic Speaker Accessory Kit

2 Piece 4" Self-Adhesive Foam Speaker Ring Baffle Kit with 1.38 Square Feet of Sound Dampening Material (Two 10" x 10" Pieces)

FRING4_SDSK2_ACC_KIT big
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2 Piece 4" Self-Adhesive Foam Speaker Ring Baffle Kit with 1.38 Square Feet of Sound Dampening Material (Two 10" x 10" Pieces)

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Easy peel and stick installation

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
52
List price $37.73
-34% $24.99

In stock

NVX FRING4 4" Speaker Installation Kit

Includes : 2 Piece Foam Speaker Rings, Door Panel Removal Kit, Sound Deadening and Roller

FRING4, SDSK2, SDRLR1, BTK106 big
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Includes : 2 Piece Foam Speaker Rings, Door Panel Removal Kit, Sound Deadening and Roller

• 2pc Foam Speaker Ring Kit for 4" Drivers with Egg Crate Foam Base
• Creates a tight seal around your speaker for optimum sound quality
• Egg crate foam base helps absorb unwanted echoes and reverberation
• Compatible with 4" speakers
• Reduce door panel vibration

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
223
List price $71.71
-34% $47.65

In stock

• 2pc Foam Speaker Ring Kit for 4" Drivers with Egg Crate Foam Base
• Creates a tight seal around your speaker for optimum sound quality
• Egg crate foam base helps absorb unwanted echoes and reverberation
• Compatible with 4" speakers
• Reduce door panel vibration

NVX FRING4 Basic Speaker Installation Kit

2 Piece 4" Self-Adhesive Foam Speaker Ring Baffle Kit + 2 Sheets Sound Dampening Material and Roller with 6 Piece Removal Tool Kit

FRING4_K2_R1_06_INST_KIT big
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2 Piece 4" Self-Adhesive Foam Speaker Ring Baffle Kit + 2 Sheets Sound Dampening Material and Roller with 6 Piece Removal Tool Kit

• Acoustically seals speakers for better sound performance
• Prevents front and rear wave cancellation
• Reduces panels vibrations
• Easy peel and stick installation

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
223
List price $71.71
-33% $47.99

In stock

NVX XBAF8 Premium Speaker Installation Kit

2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam with Sound Damping + Removal Tool Kit and Sound Deadening Base Pad

XBAF8_K2_05_R2_INST_KIT big
Go to item page Right Arrow Icon of Right Arrow

2 Piece Universal 8” Silicone Rubber Speaker Baffles with Self Adhesive Foam with Sound Damping + Removal Tool Kit and Sound Deadening Base Pad

• Foldable Silicone with egg crate foam
• Creates a tight seal around your speaker for optimum sound quality
• Waterproof material
• The foam baffles from the competitors will deteriorate over time, while the rubber XBAF8's will last a lifetime

shipping truck icon Free shipping in USA. Provide zip for delivery date.
found car based on your search
Fits your 550i
142
List price $82.71
-30% $57.99

In stock

NVX NPKG212 Dual 12" Bass Package

1000W Max (500W RMS) Loaded Dual 12" Sub Bass Kit with Slot Ported Box, Monoblock Amp & Remote

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1000W Max (500W RMS) Loaded Dual 12" Sub Bass Kit with Slot Ported Box, Monoblock Amp & Remote

• 12" Loaded Dual Subwoofer Enclosure with Amplifier
• 500 watts RMS
• Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

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11
List price $419.99
-11% $374.99

In stock

• 12" Loaded Dual Subwoofer Enclosure with Amplifier
• 500 watts RMS
• Class D Amplifier
• Variable Bass Boost
• Speaker-Level Inputs
• Wired Remote Bass Level Control

Limited time!

NVX XW1850BL

50 ft 18-Gauge EnvyFlex True Spec Oxygen-Free Copper Remote Wire (Blue)

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50 ft 18-Gauge EnvyFlex True Spec Oxygen-Free Copper Remote Wire (Blue)

• 50 feet 18 gauge Remote Wire
• OFC (100% Oxygen-Free Copper) material
• Color: Blue

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Universal Icon Universal – fits most vehicles.

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18
List price $19.98
-40% $11.99

In stock

• 50 feet 18 gauge Remote Wire
• OFC (100% Oxygen-Free Copper) material
• Color: Blue

NVX STBXC16

16 sq. ft. Black Subwoofer Box/Trunk Liner Carpet with Adhesive Backing

STBXC16 big
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16 sq. ft. Black Subwoofer Box/Trunk Liner Carpet with Adhesive Backing

• Extremely durable fabric that will stand up to heavy usage
• Adhesive backing allows for an easier installation process
• Easy to cut, fit, and mold to desired shape or size
• Stain resistant
• Color: Black
• Carpet Thickness: 1/8 inch
• Perfect for subwoofer boxes, car trunk liner or for use as a dash cover

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Universal Icon Universal – fits most vehicles.

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13
List price $49.99
-40% $29.99

In stock

Used from: $24.49

• Extremely durable fabric that will stand up to heavy usage
• Adhesive backing allows for an easier installation process
• Easy to cut, fit, and mold to desired shape or size
• Stain resistant
• Color: Black
• Carpet Thickness: 1/8 inch
• Perfect for subwoofer boxes, car trunk liner or for use as a dash cover

NVX XEQ7

7-Band Graphic Equalizer with Dual Auxiliary Input

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7-Band Graphic Equalizer with Dual Auxiliary Input

• 7 band-Band Graphic Equalizer
• 3 Sets of preamp outputs (front, rear and subwoofer)
• 7 volts Max preamp outputs
• Subwoofer frequency and level control
• Gold-plated RCA level inputs

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Universal Icon Universal – fits most vehicles.

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51
List price $89.99
-44% $49.99

In stock

Used from: $45.99

• 7 band-Band Graphic Equalizer
• 3 Sets of preamp outputs (front, rear and subwoofer)
• 7 volts Max preamp outputs
• Subwoofer frequency and level control
• Gold-plated RCA level inputs

NVX BIR500

500-Amp High Current Dual Battery Isolator and Relay for Car Audio Systems (Handles up to 700-Amp Surge)

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500-Amp High Current Dual Battery Isolator and Relay for Car Audio Systems (Handles up to 700-Amp Surge)

• 500-Amp continuous / 700-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16V DC operating range

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Universal Icon Universal – fits most vehicles.

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36
List price $95.99
-17% $79.99

In stock

Used from: $85.99

• 500-Amp continuous / 700-Amp surge
• Ideal for car stereo systems and mobile electronics
• Prevents the main starter battery from draining
• 10V to 16V DC operating range

NVX NBTERM2

Square Push Style Outer Design Terminal Cups With Chrome-Plated Contacts

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Square Push Style Outer Design Terminal Cups With Chrome-Plated Contacts

• Universal Square Chrome-plated Terminal Cup for Speaker & Subwoofer boxes
• Chrome-plated contacts for optimal signal transfer
• Screw binding posts for a tight secure connection
• Positive (Red) and negative (Black) indicators to ensure proper wiring
• Easy to install and use

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10
List price $9.99
-30% $6.99

In stock

• Universal Square Chrome-plated Terminal Cup for Speaker & Subwoofer boxes
• Chrome-plated contacts for optimal signal transfer
• Screw binding posts for a tight secure connection
• Positive (Red) and negative (Black) indicators to ensure proper wiring
• Easy to install and use

NVX XMANL04

1/0 or 4 Gauge AWG ANL/Mini-ANL In-ine Fuse Holder for Car Audio and Marine Audio

XMANL04 big
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1/0 or 4 Gauge AWG ANL/Mini-ANL In-ine Fuse Holder for Car Audio and Marine Audio

• ANL/Mini-ANL Fuse Holder
• One 1/0 - 4 Gauge Input
• One 1/0 - 4 Gauge Output
• Solid Brass And Satin Chrome Plated
• High-Temperature Polycarbonate Base And Cover

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Universal Icon Universal – fits most vehicles.

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51
List price $24.99
-48% $12.99

In stock

Used from: $15.99

• ANL/Mini-ANL Fuse Holder
• One 1/0 - 4 Gauge Input
• One 1/0 - 4 Gauge Output
• Solid Brass And Satin Chrome Plated
• High-Temperature Polycarbonate Base And Cover

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    FAQ for Universal-Fit Audio & Electronics in 2008 550i

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2008 BMW 550i?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your 550i.

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    • Owner's manual
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    • Vehicle produced after 2005: Inside driver's side door
    • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
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    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.