Car Sensor Replacement
Modern cars rely on dozens of sensors that tell the computers about speed, air, temperature and position. A failing sensor can trigger warning lights, rough running or limp mode, but the code often names a circuit, not a guilty part, so testing before replacing saves money.
From AED 249Written quote after diagnosis, before work startsConvenience fee applicable · shown on your written quote
- 1-3 hours depending on access to the sensor
- Pickup and delivery from your door
- Convenience fee applicable · shown on your written quote
- Diagnosis free with repair
Signs you need car sensor replacement
- ABS, traction control or stability warning on the dash
- Check engine light with oxygen sensor, airflow or temperature codes
- Rough idle, stalling or hesitation with no obvious mechanical cause
- Engine cranks but struggles to start, or cuts out while driving
- Poor fuel economy that appeared suddenly
- Speedometer or gear indicator behaving oddly
What usually causes it
Oxygen (lambda) sensors
These sit in the exhaust and slow down with age and fuel contamination. A lazy one makes the computer over- or under-fuel, wasting fuel and eventually stressing the catalytic converter.
Mass airflow and manifold pressure sensors
A dirty or failed airflow sensor misreads incoming air and upsets the mixture. Sometimes cleaning with the proper cleaner works; otherwise replacement is needed.
Crankshaft and camshaft position sensors
They tell the computer when each piston is where. When one fails, the engine may refuse to start, or stall suddenly when hot, which can be dangerous in traffic.
ABS wheel speed sensors
Mounted at each wheel, they collect metal debris and are exposed to water and damage. A dirty or broken one switches off ABS and often stability control.
How we do car sensor replacement
- 1
Scan and read live data
We read the codes and look at the sensor's live values against known-good ranges, which often reveals a slow or stuck reading before a code is stored.
- 2
Test the sensor and its wiring
Resistance, supply voltage and signal are measured, and the wiring is checked for breaks and chafing. Many sensor codes turn out to be a damaged wire or connector.
- 3
Replace the confirmed part
The correct sensor is fitted with new seals, and any corroded connector is repaired. The quote offers OEM or aftermarket sensors; for some critical ones, we explain the difference in quality.
- 4
Clear codes and relearn
Fault memory is cleared, and learned values are reset where required. A road test confirms that the warning light stays off and the live data is normal.
In Dubai, Sharjah and Ajman
Fine desert dust and sand end up on airflow sensors and in wheel-speed sensor wells, and the brake dust and road grit around them builds fast on busy roads. Heat also ages exhaust-side sensors and their wiring sooner, so lambda sensors on higher-mileage cars here often show slow response.
Questions about car sensor replacement
Can I just clear the code?
You can, but if the sensor is actually faulty the light returns, and a faulty sensor can harm other parts. Fix the cause and then clear the code.
Why replace oxygen sensors in pairs?
We do not always. We replace the one that fails the test, though sensors of the same age often follow each other and we point it out so you can decide.
Are cheap aftermarket sensors okay?
For some sensors yes, for others no, because signal accuracy matters. We say which is which and put OEM and aftermarket prices on the quote.
Do you recalibrate after fitting a sensor?
Where a relearn is required, for example a throttle position, steering angle or some camshaft sensors, we perform it with the scanner as part of the job.
How long does a sensor last?
There is no fixed life. Oxygen sensors often start slowing after 100,000 km or so, while wheel-speed and position sensors can last the life of the car unless damaged or contaminated. We replace on evidence, not on mileage alone.
Last updated
Get a written quote
Tell us about your car. You get an itemised quote before any work starts, and you choose OEM, aftermarket or used parts.