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Chris (aka- Moose)
Chris (aka- Moose), Buick Technician
Category: Buick
Satisfied Customers: 48344
Experience:  16 years of experience
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98 Buick: many o2 sensors does it have

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i have a 98 Buick park ave. how many o2 sensors does it have? if it has more than one how many should i replace? what is the best o2 sensor to get?

Hello, I'm Chris.
I will do my best to answer your question fast and accurate using the info you have provided. Thanks for visiting Just Answer.


The best brand is bosch O2 sensors.

You only replace the ones which are faulty.

There should be 3 sensors. one at each exhaust manifold and one after the catalytic converter.

Chris (aka- Moose) and 7 other Buick Specialists are ready to help you
Customer: replied 7 years ago.
I'm looking to better my gas milliage and heard thats changing your o2 sensors helps.

Actually changing parts that are not flagging the computer as faulty components is not going to help. Fuel mileage helpers would be a tune up and something like the task below.


Customer: replied 7 years ago.
k. thank u very much.
Your welcome