Audi 90 Speedometer Isn't Working

Common Causes of Speedometer Malfunctions in Your Audi 90 and How to Fix Them

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Reviewed by
Aisha
Written by RepairPal Car Genius
Updated January 14, 2025
0%
35% chance it's the
Vehicle Speed Sensor (VSS)
0%
28% chance it's the
Speedometer
0%
23% chance it's the
Electrical Issue
0%
14% chance it's
Something else
The most common reasons a Audi 90 speedometer isn't working are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.
  • Vehicle Speed Sensor (VSS): A faulty vehicle speed sensor can result in inaccurate speed readings and erratic transmission shifting.
  • Speedometer: A faulty speed sensor or a broken connection in the speedometer circuit can result in inaccurate speed readings.
  • Electrical Issue: A blown fuse or a short circuit in the wiring can cause various electrical issues in the vehicle's systems.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

Troubleshooting a Non-Working Speedometer in an Audi 90

When faced with a non-working speedometer in your Audi 90, it's essential to adopt a systematic diagnostic approach. Begin by inspecting the vehicle speed sensor (VSS), as this is often the primary culprit behind speedometer failures. A simple visual check of the speedometer cable can reveal any obvious signs of wear or disconnection. If the cable appears intact, proceed to examine the wiring for any frayed or damaged sections, particularly under the steering wheel where connections can be compromised. If these initial checks do not resolve the issue, consider removing the gauge cluster to access the speedometer directly. This process involves unscrewing the ignition binnacle and carefully detaching the cluster. Once you have access, inspect the speedometer and odometer for any mechanical failures, such as broken gears, which can often be replaced with relative ease. By following this methodical approach, you can effectively diagnose and potentially fix the speedometer issue, saving time and money while enhancing your DIY skills.

What to Check When the Speedometer Isn't Working in an Audi 90?

When your Audi 90's speedometer stops functioning, it can be frustrating, but understanding the common problems can help you troubleshoot effectively. One of the first components to check is the Vehicle Speed Sensor (VSS), which is crucial for relaying speed information to the speedometer. If the VSS is dislodged or damaged, it can lead to a complete failure of the speedometer. Additionally, the speedometer unit itself may be at fault, particularly if the odometer has also ceased to work; issues with the internal gears or the spinning shaft can disrupt its operation. Electrical problems are another frequent culprit, so inspecting the wiring and connections for any signs of wear or disconnection is essential. If you've recently performed repairs or removed the instrument cluster, these actions could inadvertently affect the speedometer's functionality. By systematically checking these areas, you can identify the root cause of the issue and take the necessary steps to restore your speedometer to working order.

Why is the Speedometer Not Working in an Audi 90?

When the speedometer in your Audi 90 stops functioning, it’s crucial to address the issue promptly, as neglecting it can lead to serious safety risks and further vehicle damage. A non-working speedometer can impair your ability to gauge your speed, increasing the likelihood of speeding violations and accidents. Additionally, the underlying causes, such as a faulty Vehicle Speed Sensor (VSS) or issues with the electrical system, may affect other critical vehicle functions, including the Anti-lock Braking System (ABS). This interconnectedness means that what seems like a minor inconvenience could escalate into more significant problems if left unchecked. Therefore, it is advisable to conduct a thorough diagnosis, starting with the VSS, and consider seeking professional help to ensure your vehicle remains safe and reliable on the road.

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