If you’ve ever been driving along and suddenly noticed your speedometer needle drop to zero, you know how unsettling it can be. A broken speedometer makes it difficult to know how fast you’re going, putting you at risk of a speeding ticket or even an accident. But don’t panic – there are a few common causes of speedometer failure, and most can be fixed without too much hassle.
Symptoms of a faulty speedometer
The most obvious sign of a broken speedometer is the needle not moving at all, even as your car accelerates. You might also notice:
- The needle jumps erratically between different speeds
- The odometer not tracking mileage
- Cruise control not working properly
- Warning lights like the check engine light turning on
What causes a speedometer to stop working?
In most modern cars, the speedometer is controlled electronically via the vehicle speed sensor. This sensor sends data to the car’s computer, which then relays it to the speedometer. If the sensor or wiring becomes damaged, it can cause the speedometer to malfunction.
Other potential causes include:
- A faulty engine control module (the car’s main computer)
- Broken speedometer gears or cables (in older vehicles)
- Improper calibration after a tyre size change
Fixing a broken speedometer
To diagnose the issue, a mechanic will typically start by checking for diagnostic trouble codes using a scan tool. This can point to problems with the speed sensor, wiring, or control module. A visual inspection can also reveal damaged wires or corroded connections.
Depending on the cause, repairs could be as simple as replacing a damaged wire or speed sensor. More complex issues like a failed control module may require the replacement of the entire unit. In some cases, the speedometer itself may need to be replaced or recalibrated.
What does it cost to fix a speedometer in NZ?
Speedometer repair costs can vary quite a bit depending on the specific issue and the make and model of your vehicle. Based on quotes from New Zealand mechanics, you can expect to pay:
- $100-$300 to replace a speed sensor
- $50-$200 to repair damaged wiring
- $400-$1000+ to replace an engine control module
- $200-$600 to replace the speedometer/instrument cluster
Keep in mind these are just rough estimates – it’s always best to get a specific quote for your vehicle and issue.
Get your speedo fixed with My Auto Shop
If your speedometer has stopped working, the mobile mechanics at My Auto Shop can help. We’ll come to you to diagnose the problem and provide an upfront, competitive quote for repairs. Our expert technicians have experience with all makes and models, and we use only high-quality parts.
Best of all, we make the process hassle-free. With our mobile service, you can get your speedo fixed without even leaving your driveway. And with our focus on customer care, you can trust you’re getting top-notch service every time.
Don’t let a broken speedometer stress you out. Book a mobile mechanic with My Auto Shop today and get back to driving with confidence.