jayrawk

Hello,

I got check engine light, did diagnostics and came back P0133 Bank 1 Sensor 1, I'm reading, Bank 1 Sensor 1 means Upstream Right/Rear; having trouble figuring out what part it is, I'm seeing these two but not 100% sure: Part Number: 009-542-60-18 and Part Number: 008-542-78-18, any help would be appreciated.

Also, will Bosch brand work fine for this or should I get the OEM from the dealership?

Tom in Austin

Not sure your model or year, but Rock Auto shows the downstream and upstream sensors for a 2016 S550 here ... https://www.rockauto.com/en/catalog/...2)+sensor,5132

The Bosch upstream sensor line item references "OEM / Interchange Numbers: 0095425918, 0095426018". 'Upstream' of course means before the catalyst.

I don't always buy stuff from RA, but their catalog info seems pretty reliable for the things I've needed.

jayrawk

Thanks, I have a 2014 s550 base model. I'll take a look at RA.

jayrawk

I found this part which looks to be correct: https://www.rmeuropean.com/Products/...14-V13058.aspx

It does say Position Upstream Left, Upstream Right, does w222 use the same o2 for both left and right upstream?