BMW 335i Oxygen Sensor Replacement at your home or office.

Our mobile mechanics offer services 7 days a week. Upfront and transparent pricing.

Estimate price near me

Service Location

Customer Ratings

(230)

Included for free with this service

Online Booking

Mechanic comes to you

12-month / 12k-mile warranty

Free 50 point safety inspection

Our certified mobile mechanics can come to your home or office 7 days a week between 7 AM and 9 PM.

Customer Ratings

(230)

Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a BMW 335i Oxygen Sensor Replacement is $608 with $418 for parts and $190 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
2012 BMW 335iL6-3.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$2052.95Shop/Dealer Price$2486.35 - $3506.94
2009 BMW 335iL6-3.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$2744.02Shop/Dealer Price$3417.60 - $5359.43
2013 BMW 335iL6-3.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1910.95Shop/Dealer Price$2344.55 - $3365.29
2009 BMW 335iL6-3.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1045.90Shop/Dealer Price$1293.61 - $1950.16
2007 BMW 335iL6-3.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1511.35Shop/Dealer Price$1845.25 - $2566.44
2014 BMW 335iL6-3.0L TurboService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$1991.95Shop/Dealer Price$2445.80 - $3527.29
2012 BMW 335iL6-3.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1639.85Shop/Dealer Price$1995.11 - $2784.63
2008 BMW 335iL6-3.0L TurboService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$1546.85Shop/Dealer Price$1883.49 - $2606.74
Show example BMW 335i Oxygen Sensor Replacement prices

What is the Oxygen Sensor all about?

With each new model year, manufacturers are adding more oxygen sensors to better manage engine operation. Some high performance engines have an oxygen sensor for each cylinder as well as one for the rear of each catalytic convertor. The sensors are located either underneath the hood or underneath the car. The oxygen sensors are connected (screwed) to the exhaust pipe, either in front or back of the catalytic converter. The front (upstream) sensors measure the amount of oxygen in the exhaust system. The purpose of the front oxygen sensor(s) is to measure how rich or lean the gases are as the gases exit the combustion chamber. Depending upon whether the exhaust gas is lean (high in oxygen content) or rich (low in oxygen content), the amount of fuel entering the engine is adjusted by the engine management computer to try and maintain an ideal mixture that produces the lowest emissions output from the catalytic convertor.

Rear (downstream) sensors are located behind the catalytic converter. The purpose of the rear oxygen sensor(s) is to monitor the oxygen content of the exhaust gases leaving the catalytic convertor.

If one or more of the oxygen sensors are faulty, your car may not pass the emissions test. If you drive your car with a faulty oxygen sensor, you may get poor gas mileage and it can damage the catalytic converter.

Oxygen Sensor-MATROX-1

When replacing the oxygen sensor remember:

  • Many oxygen sensors are damaged by leaking oil or coolant. If that is the case, the cause of that leak needs to be identified and repaired, or else the replacement oxygen sensor will be damaged as well.
  • New vehicles require specific oxygen sensors, and not the universal sensors that were common prior to 1996.

How it's done:

  • Scan the computer in the car for codes.
  • Inspect for vacuum leaks and holes in the exhaust system.
  • Remove and replace the oxygen sensor if it is bad.
  • Check electrical connections.
  • Check for proper operation of oxygen sensors.
  • Clear diagnostic codes.
  • Test drive car.

Our recommendation:

Keep up with the tune-ups. If check engine light is on, don't drive the car too long without getting it inspected. If check engine light is flashing, pull over and get the car towed to avoid costly repairs. Ask the mechanic to inspect the vacuum hoses and leaks in the exhaust system. If the vacuum hose or exhaust system is leaking, it will display an oxygen sensor fault code. Replacing an oxygen sensor may not fix the problem.

What common symptoms indicate you may need to replace the Oxygen Sensor?

  • Check Engine light is on.
  • Car is getting poor gas mileage.
  • Emission test fails.

How important is replacing the oxygen sensor?

Your vehicle has multiple oxygen sensors, and they all help the car run optimally. The front sensors measure how much oxygen is in the exhaust stream to measure how rich or lean the gases leaving the gas chamber are. The rear sensors measure the oxygen content of the gases as they leave the catalytic converter. The oxygen sensors then relay this information to your vehicle’s electronic control unit, so that it can adjust as necessary. Because cars depend on an ideal fuel-to-air ratio to function optimally, the oxygen sensors are leaned on for engine performance. When your oxygen sensors fail your car will run less smoothly, get worse mileage, and have worse emissions.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(230)

Rating Summary
220
3
2
0
5
220
3
2
0
5

Robert

21 years of experience
64 reviews
Robert
21 years of experience
BMW 335i L6-3.0L Turbo - Brake Pads Replacement (Rear) - Bothell, Washington
Robert was very helpful, knowledgeable and knew exactly what he was doing. He was happy to answer all my questions and let me look while he was working on my brakes. Really cool guy, will definitely contact again once I'm due for more service.

Harish

27 years of experience
588 reviews
Harish
27 years of experience
BMW 335i L6-3.0L Turbo - Brake System Flush - Charlotte, North Carolina
Early to the appointment and checked before hand if it was okay. Completed the job in under an hour. Thanks Harish!

Brandon

18 years of experience
275 reviews
Brandon
18 years of experience
BMW 335i L6-3.0L Turbo - Pre-purchase Car Inspection - Loganville, Georgia
Very nice guy

Adam

17 years of experience
124 reviews
Adam
17 years of experience
BMW 335i L6-3.0L Turbo - Spark Plugs - Spring, Texas
Easy, efficient, professional, and half the cost of what the dealership wanted to charge. Very impressed, and will definitely use again.

Excellent Rating

(230)

Rating Summary
220
3
2
0
5
220
3
2
0
5
Number of BMW 335i services completed
2530+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform

Recent articles & questions

The Most Common Error Codes for Transmission Problems
If your Check Engine Light has come on, there are a number of conditions that could be causing it. Many are related...
Symptoms of a Bad or Failing Brake Booster Vacuum Sensor
A failing brake booster vacuum sensor will cause the brake pedal to be stiff or turn on the Check Engine Light.
How to Replace a Car Battery Temperature Sensor
The battery has a battery temperature sensor that can fail if the Check Engine Light comes on, the battery voltage is low, or the RPM curve surges.

Purge flow sensor code

Hi, it is fairly rare for this to happen with a purge flow issue. Purge flow refers to the cars EVAP system. This system collects the fuel that evaporates inside the gas tank to ensure that pretty much 100% of...

Car cranks but no start or spark

From what you've described, you may have a bad crankshaft sensor (https://www.yourmechanic.com/services/crankshaft-position-sensor-replacement). You'll know if this is the case once you run a scan test to get sensor data. The sensor may not be sending a crankshaft signal to the...

Why does my car have rough idle and lack of power only on warm days?

This problem may be caused by a coolant temperature sensor, idle air control valve, throttle position sensor, or O2 sensor that may be failing. Use a digital volt ohm meter (DVOM) to check resistance on all of the sensors. If...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com