Buick LeSabre 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

(356)

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

(356)

Oxygen Sensor Replacement Service

How much does a Oxygen Sensor Replacement cost?

On average, the cost for a Buick LeSabre Oxygen Sensor Replacement is $173 with $33 for parts and $140 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1995 Buick LeSabreV6-3.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$396.72Shop/Dealer Price$460.75 - $644.74
1994 Buick LeSabreV6-3.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$281.65Shop/Dealer Price$317.40 - $420.52
2000 Buick LeSabreV6-3.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$359.35Shop/Dealer Price$414.55 - $575.96
1999 Buick LeSabreV6-3.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$359.35Shop/Dealer Price$414.55 - $575.96
1993 Buick LeSabreV6-3.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$311.23Shop/Dealer Price$355.87 - $482.30
1995 Buick LeSabreV6-3.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$281.65Shop/Dealer Price$317.56 - $420.81
1997 Buick LeSabreV6-3.8LService typeOxygen Sensor - Front/Upper/Upstream ReplacementEstimate$384.03Shop/Dealer Price$445.41 - $625.35
2004 Buick LeSabreV6-3.8LService typeOxygen Sensor - Rear/Lower/Downstream ReplacementEstimate$472.11Shop/Dealer Price$555.50 - $801.48
Show example Buick LeSabre 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 Buick mechanics

Real customer reviews from Buick owners like you.

Excellent Rating

(356)

Rating Summary
326
22
3
2
3
326
22
3
2
3

Joseph

15 years of experience
12 reviews
Joseph
15 years of experience
LeSabre 1998 - Car is not starting - Ravenel, SC
Joe is great! Very friendly, professional and knowledgeable.

Joseph

15 years of experience
12 reviews
Joseph
15 years of experience
LeSabre 1998 - Radiator - Ravenel, SC
Joe was incredible! Very nice and professional. I will definitely request him again very soon for other repairs needed. He got my car running and that was the priority this time.

Joshua

6 years of experience
35 reviews
Joshua
6 years of experience
LeSabre 2002 - Power steering fluid is leaking - Denton, TX
Josh is not only professional he is very nice and friendly. This was the first time using the service and he was able to answer my questions with no problem.

Alexander

5 years of experience
126 reviews
Alexander
5 years of experience
LeSabre 2003 - Power Steering Pressure Hose - Columbus, OH
Awesome work despite all the rust he had to deal with. Very friendly, helpful and transparent.

Excellent Rating

(356)

Rating Summary
326
22
3
2
3
326
22
3
2
3
Number of Buick LeSabre services completed
3916+
services done by our mechanics
TOTAL NUMBER OF EXPERT Buick MECHANICS
800+
experts on our platform

Recent articles & questions

Symptoms of a Bad or Failing EGR Temperature Sensor
Common signs include engine ping or knock, the Check Engine Light coming on, and failing an emissions test.
How to Buy a Good Quality Speedometer Sensor
Modern Modern vehicles are great: they offer so many advanced features to help keep you safe on the road. The speedometer sensor is one of those great inventions – created to help you keep to a safe speed and not...
Symptoms of a Bad or Failing EGR Pressure Feedback Sensor
Common signs include engine performance issues like rough idle and decrease in power, failing an emissions test, and the Check Engine Light coming on.

Car takes 2-3 tries before starting

You will need to have a mechanic diagnose both the codes (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) to see if you have a problem with both sensors or have a problem with the timing of the engine being out of position. The codes suggest that...

will a defective oil pressure sensing system prevent engine starting even if it turns over

Hello. If the oil pressure sensor (https://www.yourmechanic.com/services/oil-pressure-sensor-replacement) was bad it would not keep the vehicle from starting. If there is no oil pressure on the gauge when starting it then there is a supply issue. Most of the time this...

What is the function of the crankshaft sensor in a 2005 Lincoln LS 3.9 liter v-8 ?

Hello - the crankshaft position sensor (CPS) provides an ignition timing reference information (https://www.yourmechanic.com/article/what-is-the-difference-between-conventional-electronic-and-distributor-less-ignition-systems) for the engine management for both ignition and fuel injection. Originally, the CPS provided only timing information for the ignition, replacing old-fashioned distributors. However, with newer,...

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