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Discussion Starter #1
Hello everyone again.

Last week I hooked up my E46 to my dad's snap on code reader and got this code
270618


Yesterday my engine light came on so I borrowed a code reader off a mate and got this code
270619

From what I googled its caused by a faulty pre cat lamba sensor. I'm really struggling to find a part number. Real oem shows that the N42 engine has 4 lamba sensors other places says it only has 2 lamba sensors.

Euro car parts have 5 available
270620

270621


Which one do I buy?

Any help would be appreciated

Thank you
 

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Discussion Starter #3
Check on bmwfans and try and cross reference against euro and gsf

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Thanks mate. Had a look on bmwfans pretty much the same as real oem.

I found a guide to change the pre cat sensor on a N42 318ci engine and they say the part number is 11781247406 completely different to BMW fans and real oem.

I'm soo fucking confused
 

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Discussion Starter #5
Thanks mate. I rang them they have me 2 part numbers 🤣 11787512975 and 11787512976.

Considering the 975 has popped up twice on real oem and BMW fans I'll go with that one and see if that works.

Cheers mate
 

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No probs hope you get to the bottom of it

Only other way is to see the part number on the original one on the car

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