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2001 Audi A4

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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 Stereo 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 2001 Audi A4

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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Directed 508D

Invisibeam Field Disturbance Sensor

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Directed 508D

Invisibeam Field Disturbance Sensor

• Invisibeam® Field Disturbance Sensor
• Generates two invisible detection fields around your vehicle
• Offers 2 response types

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

Universal Icon Universal – fits most vehicles.

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14
List price $94.99
-52% $45.99

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• Invisibeam® Field Disturbance Sensor
• Generates two invisible detection fields around your vehicle
• Offers 2 response types

Directed 506T

Glass Break Audio Sensor

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Directed 506T

Glass Break Audio Sensor

• Audio Sensor That Detects Attempts to Tamper with or Break Your Vehicle's Glass

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

Universal Icon Universal – fits most vehicles.

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19
List price $41.99
-33% $27.99

In stock

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• Audio Sensor That Detects Attempts to Tamper with or Break Your Vehicle's Glass

Directed 504D

Stinger DoubleGuard Shock Sensor

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Directed 504D

Stinger DoubleGuard Shock Sensor

• Stinger DoubleGuard Shock Sensor
• Adjustable Sensitivity
• Wire Harness Included

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Universal Icon Universal – fits most vehicles.

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3
List price $31.99
-38% $19.99

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• Stinger DoubleGuard Shock Sensor
• Adjustable Sensitivity
• Wire Harness Included

Directed 509U

Ultrasonic Sensor for Security Systems (DEI Install Essentials 509U)

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Directed 509U

Ultrasonic Sensor for Security Systems (DEI Install Essentials 509U)

• Ultrasonic Sensor for Security Systems
• Detects air pressure changes in the cabin of the vehicle
• Detect thieves entering vehicle without glass breakage
• Adds extra protection when used in conjunction with other security systems

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

Universal Icon Universal – fits most vehicles.

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2
List price $94.99
-69% $29.00

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• Ultrasonic Sensor for Security Systems
• Detects air pressure changes in the cabin of the vehicle
• Detect thieves entering vehicle without glass breakage
• Adds extra protection when used in conjunction with other security systems

Omega AU-94TM

Dual Zone Proximity Sensor

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Omega AU-94TM

Dual Zone Proximity Sensor

• Dual Zone Proximity Sensor
• Dual zone sensing
• Protects both inside and outside of the vehicle
• Each zone is independently adjustable
• LED sensitivity test light
• Pre-wired 4-pin plug allows easy connection to all Omega systems

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

Universal Icon Universal – fits most vehicles.

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11
List price $73.99
-51% $35.99

Available

Ships in 10-14 days

Add to Cart

• Dual Zone Proximity Sensor
• Dual zone sensing
• Protects both inside and outside of the vehicle
• Each zone is independently adjustable
• LED sensitivity test light
• Pre-wired 4-pin plug allows easy connection to all Omega systems

Omega AU-46 (Bag of 5)

Mercury Tilt Sensor

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Omega AU-46 (Bag of 5)

Mercury Tilt Sensor

• Mercury Tilt Switch
• Detects Open Zones
• Waterproof Design
• Adjustable Angle

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

Universal Icon Universal – fits most vehicles.

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3
$23.99

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• Mercury Tilt Switch
• Detects Open Zones
• Waterproof Design
• Adjustable Angle

 
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    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.
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    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!
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    FAQ for Universal-Fit Audio & Electronics in 2001 A4

    Q: Can I upgrade or change the Universal-Fit Audio & Electronics in 2001 Audi A4?

    A: Yes this page includes all the best Universal-Fit Audio & Electronics that work in your A4.

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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.

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