2017~2025: Rock Auto Upstream O2 Sensor Denso wrong CX-5 part

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Recently I decided to replace both O2 sensors, upstream and downstream. Ordered both from Rock Auto, got them, but the upstream it's not the right one, the harness is extremely short. Just a heads up, if you order, for the upstream O2 sensor, the part number DENSO 2345733, the harness it's super short, 10-11 inches, it won't reach the connector. I am not sure why this particular sensor is an option for a CX-5. It seems to me that nobody at Rock Auto has any idea about the required length of the harness.

 

[Mazdiod2]

So did you find a way to stretch the harness? Are you getting better mileage now?

 

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So did you find a way to stretch the harness? Are you getting better mileage now?

There is no such thing, "stretch the harness". You can't stretch a wire . Ordered a new O2 sensor from a different vendor.

 

[Mazdiod2]

I only have a little over 50K but I have wondered if I need new o2 sensors. The exhaust tips are a bit black. I get pretty good gas mileage, though. I guess if DENSO doesn't fit right, the Mazda OEM would?

 

[Lazy2.5]

I only have a little over 50K but I have wondered if I need new o2 sensors. The exhaust tips are a bit black. I get pretty good gas mileage, though. I guess if DENSO doesn't fit right, the Mazda OEM would?

Does your engine consume oil? Are you hard on the car?

I noticed a tiny but of black run off, past the exhaust pipe onto the chrome tip, but only during very hard acceleration. My o2 sensors seem to still be reading well with 300k km on the car. no cel or stored codes.

 

[Mazdiod2]

I don't think I drive it hard, but most miles are on the highway. I haven't gotten any codes or anything. Maybe it is the DI.