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Car oxygen sensors are also called lambda sensors.

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Recent Reviews Related to Car Oxygen Sensor Replacement

177 Reviews

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Jamies Mobile Mechanics

Garage in Darwen, 14 years of experience

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Want to learn more about Car Oxygen Sensor replacements?

Read our short guide with information on costs, symptoms and more.

What does an Oxygen Sensor do?

The sensor measures the amount of oxygen, or O2 present in the fuel / air mixture and engine emissions. Most cars have several oxygen sensors spread over the engine and its ancillaries; from the inlet manifold to the exhaust. Some cars even have a seperate sensor for each cylinder.

Usually the sensor puts out a voltage between 0.1 and 1 volt depending on the current passing through. This information from the sensors is processed by the engine's computer (ECU). The ECU in turn optimises the amount of fuel and air entering the engine to ensure optimal combustion and reduced emissions.

What does a oxygen sensor replacement involve?

  • The mechanic will read the ECU for possible fault codes related to the oxygen sensors.
  • The mechanic will inspect the sensor and ancillaries (like the electrical connectors).
  • If necessary, the mechanic will replace the sensor.
  • The mechanic will advise if other components need to be replaced as well.
  • The mechanic will check the sensors again.
  • The mechanic will test drive the car, if necessary the mechanic will make adjustments.

Can I replace the oxygen sensor myself?

Unless you are a qualified mechanic with the required skills, training and equipment to do the job, we strongly recommend a car oxygen sensor replacement is only carried out by a professional mechanic. ClickMechanic can help get you a vetted and local mechanic to carry out the work. Just enter your postcode and your car's registration number at the top of this page and select the work needed to get an instant fixed price up front.

What are the symptoms of a faulty Oxygen Sensor?

  • When the 'Check Engine' light on your dashboard is on.
  • When the engine won't start or cuts out during operation.
  • When the engine misfires.
  • When the engine runs rough (a rough idle for example).
  • When the engine doesn't perform as well as usual.
  • When the car's fuel consumption is higher than usual.
  • When the car fails an emissions test.

How long does it take to replace an o2 sensor?

A car oxygen sensor replacement usually takes around 1 hour, but can take less or more time. Ultimately, the time that the job will take will depend on a number of factors, like your vehicle's make and model, year, as well as other factors. Select your car at the top of this page for information on job time and cost for your vehicle through ClickMechanic.

How often should you replace an oxygen sensor?

For an optimal combustion of the air / fuel mixture within the engine it is important to service the oxygen sensors as and when stipulated in the guidelines set out by your car's manufacturer. Professional and timely maintenance is essential to prevent further damage of other parts of the engine. Should you experience problems with an oxygen sensor, then it is advisable to have it inspected and, if necessary, have the sensor replaced.

What happens if I don't replace my oxygen sensor (or lambda sensor)?

Over time, an oxygen sensor can soil due to the dirty air passing along it. This decreases the sensor's ability to identify the amount of oxygen that is present in the area of the engine system it is situated. This can lead to the ECU not being able to regulate the fuel / air mixture correctly which can have as a consequence that the engine will run lean or rich. In turn the car can have poor fuel consumption, equally it might cause the car to fail an emissions test.

In many cases an oxygen sensor can be cleaned of dirt to restore its functionality. In other cases it can be that the oxygen sensor has really failed, in which case it needs to be replaced to prevent further issues and inconvenience.

Can I drive with a faulty oxygen sensor?

If you suspect there is any issue with your oxygen sensor (also known as an O2 sensor) or there are concerns about its age or condition, book an inspection with a professional mechanic immediate effect. Driving with a faulty oxygen sensor can lead to further complications on your vehicle.

Can you replace just one oxygen sensor?

A car usually has two oxygen sensors if it has a single exhaust pipe and catalytic converter, and sensors could be independently replaced. It is advisable to check with a professional mechanic whether it is possible to just replace one sensor as this can depend on a number of factors.

How much does it cost to replace oxygen sensors?

On average an oxygen sensor replacement costs around £150. Typical prices can range anywhere from £110 to £220. Ultimately, the cost of replacing a oxygen sensor (or lambda sensor) depends on your car and what parts your car's manufacturer recommends using for the replacement. Find out what you could save by having the oxygen sensor replaced by ClickMechanic by selecting your car at the top of this page!

Want to know how much you'd pay at a franchise dealer or independent garage?

Check out the ClickMechanic price for a Car Oxygen Sensor replacement. We use industry standard data & millions of data points so you know what you should be paying

These estimates may include Lambda sensor, Lambda sensor, Lambda sensor and/or Lambda sensor.

46 manufacturers for Car Oxygen Sensor Replacement

Name ClickMechanic Click Mechanic average Franchise dealer estimate

Alfa Romeo

£167 £164 - £312 Get exact price


£192 £182 - £304 Get exact price


£178 £231 - £231 Get exact price


£274 £209 - £456 Get exact price


£152 £119 - £238 Get exact price


£143 £121 - £244 Get exact price


£155 £154 - £252 Get exact price


£157 £203 - £269 Get exact price


£151 £181 - £233 Get exact price


£193 £185 - £325 Get exact price


£131 £193 - £193 Get exact price


£164 £199 - £199 Get exact price


£143 £135 - £236 Get exact price


£160 £146 - £251 Get exact price


£194 £161 - £324 Get exact price


£170 £155 - £283 Get exact price


£157 £223 - £223 Get exact price


£190 £237 - £237 Get exact price


£150 £164 - £210 Get exact price


£193 £236 - £313 Get exact price


£180 £154 - £360 Get exact price


£152 £150 - £248 Get exact price

Land Rover

£196 £146 - £337 Get exact price


£189 £182 - £331 Get exact price


£114 £150 - £150 Get exact price


£279 £197 - £517 Get exact price


£199 £207 - £329 Get exact price


£155 £171 - £241 Get exact price


£160 £140 - £260 Get exact price


£226 £174 - £361 Get exact price


£156 £137 - £258 Get exact price


£162 £154 - £271 Get exact price


£189 £216 - £281 Get exact price


£156 £214 - £214 Get exact price


£154 £150 - £257 Get exact price


£154 £154 - £241 Get exact price


£166 £178 - £252 Get exact price


£192 £174 - £309 Get exact price


£185 £173 - £310 Get exact price


£144 £150 - £257 Get exact price


£214 £182 - £363 Get exact price


£171 £199 - £266 Get exact price


£177 £203 - £270 Get exact price


£158 £149 - £261 Get exact price


£192 £175 - £306 Get exact price


£212 £166 - £331 Get exact price

Prices could not be created for 34 models. Show ∨

  • Microcar
  • Metrocab
  • Hummer
  • Reva
  • Asia
  • TVR
  • Ferrari
  • Morgan
  • Buick
  • Lamborghini
  • Pontiac
  • Carbodies
  • DS
  • Mitsubishi Fuso
  • Moskvich
  • Cadillac
  • LDV
  • Ford US
  • Aixam
  • Austin
  • FSO
  • Maybach
  • Rolls-Royce
  • Santana
  • Tata
  • Great Wall
  • Piaggio
  • Perodua
  • Aston Martin
  • Lada
  • Lancia
  • Lotus
  • Ssangyong
  • London Taxi's International

Estimates on repair costs, such as the above results for a car oxygen sensor replacement, are created by combining data from multiple third-party sources. The actual cost of using your local repair providers may be outside of the estimated range. We provide estimates on repair costs for information only and accept no liability for any inaccuracies or errors. If you think an estimate is incorrect, please contact us to let us know.

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Recent Car Oxygen Sensor replacement quotes

These recent quotes were taken from our quote engine which uses third-party industry standard data on repair times, along with a live parts retailer, and a regional labour rate to build an accurate free quote. We are constantly improving our quote engine, so please let us know if a price seems incorrect.


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