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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

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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

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This product fits your 1988 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 1980-2020 vehicles from Volkswagen, Audi, Mercedes-Benz

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Install a new car stereo in select 1980-2020 vehicles from Volkswagen, Audi, Mercedes-Benz

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

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This product fits your 1988 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 1975-2020 vehicles from Volkswagen, Audi, Mercedes-Benz

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Install a new car stereo in select 1975-2020 vehicles from Volkswagen, Audi, Mercedes-Benz

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

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This product fits your 1988 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

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

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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

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This product fits your 1988 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-VW30 Antenna Adapter

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

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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

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This product fits your 1988 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

Metra 40-VW20 Antenna Adapter

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

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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

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This product fits your 1988 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

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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

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found car based on your search
This product fits your 1988 90 Quattro
1
Was $29.99 Details
$11.99

• 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

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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

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This product fits your 1988 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

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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

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Fits the following location in your 1988 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

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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

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Fits the following location in your 1988 90 Quattro
  • Rear Deck Corner
145
$79.99 /pair

In stock

Used from: $48.99 Like New from: $59.99
Limited time!

Alpine S2-S65

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

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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

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Fits the following location in your 1988 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

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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

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Fits the following location in your 1988 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

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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

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found car based on your search
Fits the following location in your 1988 90 Quattro
  • Rear Deck Corner
1
Was $439.95 Details
$409.95 /set

In stock

Only 2 Left!

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

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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

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found car based on your search
Fits multiple locations in your 1988 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

Alpine R2-S65C

600W Peak (200W RMS) 6.5" Next Generation R-Series 2-way 4-ohm Hi-Res Component Speaker System

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600W Peak (200W RMS) 6.5" Next Generation R-Series 2-way 4-ohm Hi-Res Component Speaker System

• 300 watts Peak Each, 100 watts RMS Each
• Hi-Res Audio certified
• 1" Magnesium Hard Dome swivel-mount tweeters with threaded removable housing
• Reinforced Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

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Fits the following location in your 1988 90 Quattro
  • Rear Deck Corner
1
Was $480.00 Details
$399.95 /set

In stock

• 300 watts Peak Each, 100 watts RMS Each
• Hi-Res Audio certified
• 1" Magnesium Hard Dome swivel-mount tweeters with threaded removable housing
• Reinforced Glass Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

Diamond Audio DMD652

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

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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

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found car based on your search
Fits the following location in your 1988 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)

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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

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found car based on your search
Fits the following location in your 1988 90 Quattro
  • Rear Deck Corner
27
Was $89.99 Details
$79.99 /pair

In stock

Hertz CK 165L

600W Peak (200W RMS) 6.5" Cento Series 2-way 4-ohm Component Speaker System

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600W Peak (200W RMS) 6.5" Cento Series 2-way 4-ohm Component Speaker System

• 300 watts Peak Each, 100 watts RMS Each
• 1" Tetolon Soft Dome tweeters
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

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found car based on your search
Fits the following location in your 1988 90 Quattro
  • Rear Deck Corner
1
Was $460.00 Details
$399.99 /set

In stock

Only 2 Left!

Like New from: $289.99

• 300 watts Peak Each, 100 watts RMS Each
• 1" Tetolon Soft Dome tweeters
• Non-Pressed Paper cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

Hertz CK 165

570W Peak (190W RMS) 6.5" Cento Series 2-way 4-ohm Component Speaker System

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570W Peak (190W RMS) 6.5" Cento Series 2-way 4-ohm Component Speaker System

• 285 watts Peak Each, 95 watts RMS Each
• 1" Tetolon Soft Dome tweeters with neodymium magnets
• Semi-Pressed paper with Mica cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

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empty

found car based on your search
Fits the following location in your 1988 90 Quattro
  • Rear Deck Corner
Was $460.00 Details
$399.99 /set

In stock

Only 3 Left!

Like New from: $289.99

• 285 watts Peak Each, 95 watts RMS Each
• 1" Tetolon Soft Dome tweeters with neodymium magnets
• Semi-Pressed paper with Mica cone material
• Impedance: 4 ohm
• Sensitivity: 93 dB

Limited time!

Kenwood KFC-1666S

600W Peak (60W RMS) 6.5" Sport Series 2 Way Coaxial 4-ohm Speakers

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600W Peak (60W RMS) 6.5" Sport Series 2 Way Coaxial 4-ohm Speakers

• 300 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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found car based on your search
Fits the following location in your 1988 90 Quattro
  • Rear Deck Corner
45
Was $80.00 Details
Save 65.48%
$27.62 /pair

• 300 watts Peak Each, 30 watts RMS Each
• 1" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

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    FAQ for your 1988 90 Quattro

    Q: Can I upgrade the factory stereo system in my 1988 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 1988 90 Quattro if there is a dash kit and harness solution available.

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    1988 Audi 90 Quattro

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    • Vehicle produced after 2005: Inside driver’s side door
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