Q: How many oxygen sensors are there on a vehicle?

asked by on November 06, 2016

Need to know how many o2 sensors there are total, and if possible the locations of them. Its a 2004 Mazda 6, v6. I think its 2 o2 sensors but im not sure. My car has a manual transmission.

Your vehicle and engine will have four O2 sensors. There is one O2 sensor in each exhaust manifold and one after each catalyst. This is a diagram of your exhaust system to see O2 sensor locations.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

The Service AdvanceTrac and power steering lights came on after I got in an accident

These warning messages are displayed when the computer detects an issue with the AdvanceTrac and power steering systems. It may be possible that damage occurred within these systems when the vehicle was involved in the accident. The AdvanceTrac system is...

Misfire rough idle

Changing the radiator should not have caused a misfire. Replacing the plugs and the MAP sensor was a great idea. What we commonly refer to as the O2 sensor is not located in the fuse box. There are two O2...

My 2004 honda accord is making a loud chirping noise. Already replaced belt, tensioner, idler. What could it be

If it is a power steering pump, then the noise should change as you turn the steering wheel from lock to lock. If it is an alternator belt, the noise will likely change as you add or remove electrical loads...

Related articles

Where Is the O2 Sensor Located?
Oxygen Oxygen sensors O2 sensors will always be located in the exhaust system. Their function is to sense how much oxygen remains in the exhaust that is flowing out of the engine, and report that information to the vehicle’s engine...
2012 Mazda CX-5 vs. 2012 Toyota RAV4: Which One Should I Buy?
Mid-size crossover SUVs are an excellent option when you need to take several friends along with you, or bring your kids along and yet still need to keep a tight leash on your purchase cost as well as your ongoing...
The Best Used Cars to Buy If You’re a Wedding Planner
As As a wedding planner, the demands placed on your time are going to be significant, even if you’re only dealing with one or two couples. You need to be a master juggler when it comes to your time and...