Garage
Shop

Shop all 1991 Audi 90 Quattro Car Audio, Speakers, & Electronics

Loading...
Filters
filter-icon Filters & Sort
Lowest price in 30 days

Metra 40-VW10 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

40-VW10 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

• Factory Antenna to Aftermarket Radio Adapter
• Compatible with select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Factory antenna with flat plug to aftermarket radio
• A capacitor is included to match the impedance

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

empty

found car based on your search
This product fits your 1991 90 Quattro
21
Was $19.99 Details
$7.99

In stock

• Factory Antenna to Aftermarket Radio Adapter
• Compatible with select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Factory antenna with flat plug to aftermarket radio
• A capacitor is included to match the impedance

Metra 70-1784 Wiring Harness

Install a new car stereo in select 1980-2017 vehicles from Volkswagen, Audi, Mercedes-Benz

70-1784 big
Go to item page Right Arrow Icon of Right Arrow

Install a new car stereo in select 1980-2017 vehicles from Volkswagen, Audi, Mercedes-Benz

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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

empty

found car based on your search
This product fits your 1991 90 Quattro
16
$12.99

In stock

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

Scosche VW01B Wiring Harness

Install a new car stereo in select 1975-2017 vehicles from Volkswagen, Audi, Mercedes-Benz

VW01B big
Go to item page Right Arrow Icon of Right Arrow

Install a new car stereo in select 1975-2017 vehicles from Volkswagen, Audi, Mercedes-Benz

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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

empty

found car based on your search
This product fits your 1991 90 Quattro
40
Was $8.95 Details
$7.99

In stock

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

Metra 40-VW30 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1973-2017 vehicles from BMW, Volkswagen, Audi

40-VW30 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1973-2017 vehicles from BMW, Volkswagen, Audi

• Antenna Adapter Kit
• Compatible with select 1973-2017 vehicles from BMW, Volkswagen, Audi Vehicles
• For adding source units with FM modulator

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

empty

found car based on your search
This product fits your 1991 90 Quattro
2
Was $29.99 Details
$20.99

In stock

• Antenna Adapter Kit
• Compatible with select 1973-2017 vehicles from BMW, Volkswagen, Audi Vehicles
• For adding source units with FM modulator

Lowest price in 30 days

Metra 40-VW53 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

40-VW53 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

• Aftermarket Radio To Factory Antenna Adapter (Amplified)
• Compatible with select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Includes Power Wire For Antenna Booster
• Can Be Used In Place Of 40-VW54

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

empty

found car based on your search
This product fits your 1991 90 Quattro
3
$12.99

In stock

• Aftermarket Radio To Factory Antenna Adapter (Amplified)
• Compatible with select 1973-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles
• Includes Power Wire For Antenna Booster
• Can Be Used In Place Of 40-VW54

Metra 40-VW20 Antenna Adapter

Connect your factory antenna to a new aftermarket radio for select 1982-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

40-VW20 big
Go to item page Right Arrow Icon of Right Arrow

Connect your factory antenna to a new aftermarket radio for select 1982-2025 vehicles from Mercedes-Benz, Audi, Volkswagen

• Factory Radio to Aftermarket Antenna Adapter
• Compatible with select 1982-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles

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

empty

found car based on your search
This product fits your 1991 90 Quattro
Was $13.99 Details
$11.99

In stock

Only 1 Left!

• Factory Radio to Aftermarket Antenna Adapter
• Compatible with select 1982-2025 vehicles from Mercedes-Benz, Audi, Volkswagen Vehicles

Lowest price in 30 days

Metra 70-1785 Wiring Harness

Install a new car stereo and retain factory amplifier in select 1988-1998 vehicles from Audi, Volkswagen

70-1785 big
Go to item page Right Arrow Icon of Right Arrow

Install a new car stereo and retain factory amplifier in select 1988-1998 vehicles from Audi, Volkswagen

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

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

empty

found car based on your search
This product fits your 1991 90 Quattro
1
Was $29.99 Details
$11.99

In stock

Only 1 Left!

• Direct Connection to the factory harness
• Color coded wires for easy installation
• No cutting or splicing required

Lowest price in 30 days

Metra 71-1784

Reverse Wiring Harness for Select 1980-2005 Volkswagen Vehicles OEM Radio

71-1784 big
Go to item page Right Arrow Icon of Right Arrow

Reverse Wiring Harness for Select 1980-2005 Volkswagen Vehicles OEM Radio

• Wiring Harness For Select 1987-Up Volkswagen Vehicles with OEM Radio
• Plugs Into Original Equipment Radio
• Power/4 Speaker
• Harness Designed To Plug In Factory Radio

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

empty

found car based on your search
This product fits your 1991 90 Quattro
5
Was $19.99 Details
$9.99

In stock

Only 2 Left!

• Wiring Harness For Select 1987-Up Volkswagen Vehicles with OEM Radio
• Plugs Into Original Equipment Radio
• Power/4 Speaker
• Harness Designed To Plug In Factory Radio

Limited time!

Kicker CSC65 (46CSC654)

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

CSC654 big
Go to item page Right Arrow Icon of Right Arrow

600W Peak (200W RMS) 6.5” CS Series 2 Way Coaxial 4-ohm Speakers

• 300 watts Peak Each, 100 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
114
Was $99.99 Details
Save $23.03
$76.96 /pair

In stock

Rockford Fosgate Prime R165X3

180W Peak (90W RMS) 6.5" Prime Series 3 Way 4-ohm Coaxial Car Speakers

R165X3 big
Go to item page Right Arrow Icon of Right Arrow

180W Peak (90W RMS) 6.5" Prime Series 3 Way 4-ohm Coaxial Car Speakers

• 90 watts Peak Each, 45 watts RMS Each
• 1/2" Piezo pole-mounted Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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

VIP Product Get $8.00 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
145
$79.99 /pair

In stock

Like New from: $59.99
Limited time!

Alpine S2-S65

480W Peak (160W RMS) 6.5" S-Series 2-way Coaxial 4-ohm Speakers

S2-S65 big
Go to item page Right Arrow Icon of Right Arrow

480W Peak (160W RMS) 6.5" S-Series 2-way Coaxial 4-ohm Speakers

• 240 watts Peak Each, 80 watts RMS Each
• Hi-Res Audio-certified
• 1" Cloth Dome tweeters
• Polypropylene, Glass Fiber and Mica cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
5
Was $180.00 Details
Save $60.05
$119.95 /pair

In stock

NVX ESP65

360W Peak (120W RMS) 6.5" E-Series 2-Way Coaxial Speakers with 13mm PEI Dome Tweeters

ESP65 big
Go to item page Right Arrow Icon of Right Arrow

360W Peak (120W RMS) 6.5" E-Series 2-Way Coaxial Speakers with 13mm PEI Dome Tweeters

• 180 watts Peak Each, 60 watts RMS Each
• 1/2" PEI (Polyetherimide) Dome Tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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

VIP Product Get $4.50 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
10
Was $53.99 Details
$44.99 /pair

In stock

JBL Stadium 62CF

660W Peak (220W RMS) 6.5" Stadium Series 2-way Component 3-ohm Speakers

Stadium 62CF big
Go to item page Right Arrow Icon of Right Arrow

660W Peak (220W RMS) 6.5" Stadium Series 2-way Component 3-ohm Speakers

• 330 watts Peak Each, 110 watts RMS Each
• 3/4" Aluminum Edge Driven Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

FREE Baffles, Damping, and More at Checkout! Shop deal
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $41.00 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
1
Was $439.95 Details
$409.95 /set

In stock

Like New from: $327.96

• 330 watts Peak Each, 110 watts RMS Each
• 3/4" Aluminum Edge Driven Dome Tweeters
• Glass Fiber cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

JBL Stage3 427F (STAGE3427FAM)

300W Peak (60W RMS) 4" Stage3 Series 2-way Coaxial 3-ohm Speakers

Stage3 427F big
Go to item page Right Arrow Icon of Right Arrow

300W Peak (60W RMS) 4" Stage3 Series 2-way Coaxial 3-ohm Speakers

• 150 watts Peak Each, 30 watts RMS Each
• Edge-driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB

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

empty

found car based on your search
Fits multiple locations in your 1991 90 Quattro
  • Dash Corner
  • Front Door
3
Was $89.95 Details
$69.95 /pair

In stock

• 150 watts Peak Each, 30 watts RMS Each
• Edge-driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 90 dB

Memphis MXA62PS

300W Peak (150W RMS) 6.5" MXA Series 2 Way Coaxial 4-Ohm Powersport Speaker Pods with RGB LED Lighting

Go to item page Right Arrow Icon of Right Arrow

300W Peak (150W RMS) 6.5" MXA Series 2 Way Coaxial 4-Ohm Powersport Speaker Pods with RGB LED Lighting

• Peak Power: 150 watts Each
• RMS Power 75 watts Each
• 1" PEI (Polyetherimide) Dome tweeters
• Injection Molded Polypropylene cone
• Impedance: 4 ohm
• Sensitivity:

FREE Baffles, Damping, and More at Checkout! Shop deal
VIP Star Icon

VIP Product Get $40.00 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
Was $509.95 Details
$399.95 /pair

• Peak Power: 150 watts Each
• RMS Power 75 watts Each
• 1" PEI (Polyetherimide) Dome tweeters
• Injection Molded Polypropylene cone
• Impedance: 4 ohm
• Sensitivity:

JL Audio C1-650se

450W Peak (100W RMS) 6.5" C1 Series 2-Way 4-ohm Component Speaker System

C1-650se big
Go to item page Right Arrow Icon of Right Arrow

450W Peak (100W RMS) 6.5" C1 Series 2-Way 4-ohm Component Speaker System


• 50 watts RMS Each
• 1" Silk Dome Tweeters
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

FREE Baffles, Damping, and More at Checkout! Shop deal
shipping truck icon Free shipping in USA. Provide zip for delivery date.
VIP Star Icon

VIP Product Get $23.00 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
1
$229.99 /set

In stock

Only 2 Left!


• 50 watts RMS Each
• 1" Silk Dome Tweeters
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

Diamond Audio DMD652

200W Peak (100W RMS) 6.5" DMD Series 2-way Coaxial Car Speakers

DMD652 big
Go to item page Right Arrow Icon of Right Arrow

200W Peak (100W RMS) 6.5" DMD Series 2-way Coaxial Car Speakers

• 100 watts Peak Each, 50 watts RMS Each
• 1" Silk Dome tweeters
• Polypropylene cone material with reinforced stamped pattern
• Impedance: 4 ohm
• Sensitivity: 87 dB

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

VIP Product Get $12.00 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
Was $129.99 Details
$119.99 /pair

In stock

Only 1 Left!

Kicker DSC650 (43DSC6504)

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

DSC650 big
Go to item page Right Arrow Icon of Right Arrow

480W Peak (120W RMS) 6.5” DS Series 2-way 4-ohm Coaxial Car Speakers (DSC6504)

• 240 watts Peak Each, 60 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome zero-protrusion tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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

VIP Product Get $8.00 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
27
Was $89.99 Details
$79.99 /pair

In stock

Rockford Fosgate Punch P1650

220W Peak (110W RMS) 6.5" Punch P1 Series 2-way 4-ohm Coaxial Speakers

P1650 big
Go to item page Right Arrow Icon of Right Arrow

220W Peak (110W RMS) 6.5" Punch P1 Series 2-way 4-ohm Coaxial Speakers

• 110 watts Peak Each, 55 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome tweeters
• Mineral-Filled Polypropylene cone material with Vertical Attach Surround Technique (VAST)
• Impedance: 4 ohm
• Sensitivity: 88 dB

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

VIP Product Get $11.00 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
60
$109.99 /pair

In stock

Used from: $84.91

• 110 watts Peak Each, 55 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome tweeters
• Mineral-Filled Polypropylene cone material with Vertical Attach Surround Technique (VAST)
• Impedance: 4 ohm
• Sensitivity: 88 dB

JL Audio C1-650x

150W Peak (100W RMS) 6.5" Evolution C1 Series 2-way 4-ohm Coaxial Car Speakers

C1-650x big
Go to item page Right Arrow Icon of Right Arrow

150W Peak (100W RMS) 6.5" Evolution C1 Series 2-way 4-ohm Coaxial Car Speakers

• 75 watts Peak Each, 50 watts RMS Each
• 3/4" Silk-suspended Aluminum Dome ferrofluid-cooled tweeters with neodymium magnets
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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

VIP Product Get $12.50 in rewards to spend later

empty

found car based on your search
Fits the following location in your 1991 90 Quattro
  • Rear Deck Corner
33
$124.99 /pair

In stock

Like New from: $104.99

• 75 watts Peak Each, 50 watts RMS Each
• 3/4" Silk-suspended Aluminum Dome ferrofluid-cooled tweeters with neodymium magnets
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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 your 1991 90 Quattro

    Q: Can I upgrade the factory stereo system in my 1991 Audi 90 Quattro?

    A: Yes you can improve your sound in your 90 Quattro by upgrading your speakers and/or adding an amplifier. You may also be able to update the stereo and main display in your 1991 90 Quattro if there is a dash kit and harness solution available.

    Save up to 10 different vehicles in your garage

    1991 Audi 90 Quattro

    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