Replacing the Power Antenna on Your 1973-1979 Audi Fox
Keep your classic Audi's radio working with a new aftermarket power antenna.
- For the 1973-1979 Audi Fox, new OEM power antennas are unavailable; aftermarket is the only practical option.
- The most common failure is a broken internal nylon cable, which causes the motor to run without moving the mast.
- URO Parts is a budget-friendly brand; it's a functional replacement but may not match the quality of the original.
- Before replacing the antenna, always check the fuse and the vehicle's main electrical grounds, as problems are common on older cars.
Symptoms of a Failing Power Antenna
When a power antenna begins to fail on a vintage car like the Audi Fox, the symptoms are usually obvious. Because this is an older vehicle, remember to check the simple things first, like the radio fuse and the condition of your car's main electrical grounds, before assuming the antenna itself is bad.
- Motor Runs Continuously: You might hear the antenna motor in the trunk or fender running for a long time, but the mast doesn't move. This almost always means the internal nylon drive cable has snapped.
- Grinding or Clicking Noises: Loud skipping or grinding sounds during operation suggest the teeth on the drive cable are stripped or the gears inside the motor are damaged.
- Mast is Stuck: The antenna might be stuck in the up or down position, or only move part of the way. This can be caused by a bent mast section or a dead motor.
- No Sound or Movement: If nothing happens when you turn the radio on or off, it could be a dead motor, a bad relay, or a problem with the power or trigger wire going to the antenna unit.
Choosing the Right Aftermarket Part
For a vehicle like the 1973-1979 Audi Fox, finding original equipment (OEM) new parts is nearly impossible. The original antennas have been out of production for decades. This is where aftermarket parts play a critical role in keeping classic cars on the road.
Brand: URO Parts
URO Parts is a common brand for aftermarket components, specializing in parts for older European vehicles that are no longer available from the dealer. When considering a URO Parts power antenna, it's important to have realistic expectations. Forum discussions among classic car owners show that while URO provides a budget-friendly solution, the quality can be inconsistent. Some users report issues with fitment or long-term durability compared to the original Hirschmann units that were likely factory-installed. However, for a non-critical part like a power antenna, it serves as a functional replacement that restores the car's original feature at an affordable price.
Pro Tip: Installation Wiring
Universal aftermarket antennas like the URO unit typically come with a simple three-wire setup. Based on user forums, the wiring is generally as follows: Red wire for constant 12V power, Black wire for ground, and a Green wire that acts as the trigger, connecting to the radio's power antenna output. When the green wire receives a 12V signal (from the radio being turned on), the antenna goes up; when the signal is gone, it goes down.
Replacement Cost
The cost to replace a power antenna on your Audi Fox will vary depending on the part chosen and whether you do the work yourself.
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (URO Parts) | $69.28 - $75.36 |
| New OEM | No Longer Available |
| Used OEM | $50 - $200+ (Very Rare) |
| Shop Labor | $100 - $175 |
Frequently Asked Questions
My antenna motor runs, but the mast doesn't move. What's wrong?
This is the most common failure. It means the flexible nylon cable inside the unit has broken from age. The motor is working, but it can't push the mast up. You will need to replace the entire antenna assembly.
Can I just replace the antenna mast?
On some original antennas, you could buy a replacement mast with a new nylon cable attached. However, for most aftermarket units, it is simpler and more effective to replace the entire motor and mast assembly. Given the low cost of a complete new unit, this is the recommended repair.
Is URO Parts a good brand for my classic Audi?
URO Parts is a budget-friendly aftermarket brand. For classic cars where original parts are unavailable, they provide a necessary option. While they may not have the same longevity as OEM parts, they are a functional and affordable way to fix your power antenna.
How can I make my new power antenna last longer?
Once installed, you can extend the life of the antenna by keeping the mast clean. Periodically, wipe the extended mast with a clean cloth. You can also apply a small amount of silicone spray to a rag and wipe the mast to help it move smoothly and prevent it from sticking.
Technical Specifications
Universal 12V power antenna. Typically uses a three-wire connection: Red (12V constant power), Black (Ground), and Green (12V switched trigger from radio).
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.