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Since my "check engine light" was on, the dealer inspected and discovered it was the Air Fuel Ratio Sensor that needed replaced in my 2003 Avalon. I was told by (business name removed) the cost is $159.00 but would still have to get someone to install. the part is $221.72 from the dealer, but not sure if I would be able to get the right part. Could be one of two different sensors. Need to know someone I could take it to to repair.

Answers from the Automotive Experts

Diane Larson, Owner/Manager at Larson's Service Hi Polly, The Air/Fuel Ratio Sensor is a fairly common failure item on the Avalon. You have 2 Air/Fuel Ratio Sensors, one for each side of the engine, known as Bank 1 and Bank 2. You also have 2 Oxygen Sensors which are in the rear of engine, behind the Catalytic Converter. Proper Testing of the Sensors will show IF the Sensor is defective and which one it is. Be sure to have that info before replacing the Sensor. Do your Internet research for a reputable shop in the area and keep in mind there may be a difference in pricing depending on the quality of part installed. Sort of like shopping for a toilet, they all look pretty much the same, but prices vary depending on options and quality, insist on a good quality part, it is very important to the way your Avalon runs! Have a Fun Day!

Lori Johnson, Owner and Instructor at Ladies Start Your Engines Dear Polly, Go to the ask patty site and search for a Female Friendly shop near you. Just put in your zip code. You want to make sure that they actually find the problem so you aren't just replacing parts at your expense. Many times the codes will give you a sensor that has a bad reading, but something else is causing the sensor to go bad. It's important to find a technician that will do a proper diagnosis before replacing parts. Lori Johnson

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