If you’ve noticed the speedometer in your Nissan doesn’t seem to display your actual speed accurately, you’re not alone. Over the years, many Nissan owners have reported speedometer inaccuracies, especially at highway speeds. As a Nissan driver, should this issue worry you? Let’s break down the causes and solutions around faulty Nissan speedometer readings.
What Causes Inaccurate Readings?
The most common culprit behind incorrect Nissan speedometer values is worn or damaged components in the vehicle speed sensor (VSS) circuit. This includes:
- Faulty vehicle speed sensor
- Failing speedometer drive gear
- Issues with the ECM/PCM computer
- Damage to related wiring harnesses
On many Nissan models, the speed sensor and drive gear wear out over time due to age and mileage. The parts fail to correctly relay wheel rotation data to the speedometer, leading to incorrect values.
How Much Of A Difference Does It Make?
Owner-reported complaints often describe Nissan speedometer readings between 5-10 mph over or under. However, the degree of inaccuracy can vary depending on the exact fault. Significant differences between actual vs displayed speeds lead to concerns around driving safety and following posted limits.
It also causes issues resetting the Maintenance data reminders. The system relies on accurate odometer mileage since service notifications are based on distance intervals.
Checking Accuracy
If you suspect an issue with your Nissan’s speedometer reading, the easiest way to test is by using a GPS speed tracking app on your smartphone. Drive at a constant speed and compare the GPS speed readout vs your Nissan’s speedometer value over several minutes.
Consistent variations beyond just a couple mph indicate a problem with the speed sensor or gauge. Consulting your local Nissan service center to diagnose the culprit is the next step.
Fixing Nissan Speedometer Problems
Repair options will depend on the specifics of your Nissan model and mileage. But commonly, technicians will first replace the vehicle speed sensor located at the front wheel hub. The part cost is usually under $100, making it the most affordable fix. If sensor replacement doesn’t resolve accuracy problems, additional diagnosis and repairs to the speedometer gauge or dashboard may be required.
While frustrating, a malfunctioning speedometer ultimately only requires fairly straightforward service to get your Nissan back to properly tracking driving speeds. Pay attention if your mileage numbers look constantly over or under the actual rate of travel, and seek an inspection when unsure. A working speedometer helps keep all drivers safe.