BMW 318is 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

(7)

$170.16 - $291.47

Price range for all vehicles


YourMechanic Benefits

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

(7)

Oxygen Sensor Replacement Estimate for BMW 318is

BMW 318is Oxygen Sensor Replacement costs $213 on average.

CarServiceEstimateShop/Dealer Price
1994 BMW 318isL4-1.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$324.95Shop/Dealer Price$405.56 - $600.99
1996 BMW 318isL4-1.9LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$265.33Shop/Dealer Price$331.14 - $481.93
1992 BMW 318isL4-1.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$314.01Shop/Dealer Price$389.48 - $572.09
1993 BMW 318isL4-1.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$309.01Shop/Dealer Price$388.68 - $574.44
1991 BMW 318isL4-1.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$415.99Shop/Dealer Price$517.32 - $779.51
1993 BMW 318isL4-1.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$319.95Shop/Dealer Price$396.32 - $588.57
1999 BMW 318isL4-1.9LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$355.33Shop/Dealer Price$439.60 - $652.06
1992 BMW 318isL4-1.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$329.95Shop/Dealer Price$408.15 - $601.77
Show example BMW 318is Oxygen Sensor Replacement prices

Oxygen Sensor Replacement Service

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

(7)

Rating Summary
7
0
0
0
0
7
0
0
0
0

Lucas

20 years of experience
864 reviews
Lucas
20 years of experience
BMW 318is - Power Steering Belt Replacement - Burbank, California
Awesome guy. Awesome service. Highly recommend.

David

27 years of experience
142 reviews
David
27 years of experience
BMW 318is - Thermo Fan Switch - San Diego, California
David's technological and mechanical trouble shooting abilities and professionalism is beyond reproach. He is not only thorough but easily explains what troubles found but also explains how the found discrepancy affects the car. If I need to call 'Your Mechanic' again, I will insist that David come again. He is the best car mechanic I have met to date.

James

11 years of experience
233 reviews
James
11 years of experience
BMW 318is - Radiator Hose Repair - Daly City, California
James was a great mechanic, he arrived early and showed me what needed to be repaired. He was very professional and experienced at what he does. The work he did was outstanding and he fixed my squealing belts. He brought all the tools that was needed even the special tools BMW uses to fix the problem I had. I would recommend using his service again for any other problems I have with my BMW.

James

11 years of experience
233 reviews
James
11 years of experience
BMW 318is - Thermostat - Daly City, California
This was my 2nd meeting with James and yet again he fixed my problem. My car has been giving me overheating problems and he fixed the problem and recommended I do other services so I don't have a problem with overheating for a long time. His personally & professionalism is what make James, he come's on time and gets his job started and when I keep him company he likes shows and teaches me how to diagnose simple fixes. Any time I have a car problem I'm giving James a call.

Excellent Rating

(7)

Rating Summary
7
0
0
0
0
7
0
0
0
0
Number of BMW 318is services completed
77+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1000+
experts on our platform

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