How to change Oxygen Sensor Bank 1

Post by **ProverbPsalms** » Thu Mar 02, 2017 1:51 pm

Hey all,

I have a 11 M56x the bank 1 sensor air fuel oxygen sensor needs to be replaced.

I took it to a mechanic he said he would have to remove the exhaust to install it.

That seems very odd to me, so i didn't go ahead with it.

Is there an easier way to instal the bank 1/1 sensor?

Post by **Ilya** » Thu Mar 02, 2017 2:20 pm

Yes. It's a PITA to get to which is why I never changed those on my 07.

post6727704.html#p6729151

Post by **ProverbPsalms** » Thu Mar 02, 2017 2:42 pm

wow, good to know. I guess he was right lol.

If its 1 B1 that would be an A/F sensor, which is different from the Oxygen sensor?

A/F Sensor 1 (B1 or B2) - 22693-1MC0B - ~$190
Heated Oxygen Sensor 2 (B1 or B2) - 226A0-ET000 - ~$190

Post by **Ilya** » Thu Mar 02, 2017 2:45 pm

They are technically one and the same, just serve different purposes. A/F sensor is what the engine uses to tune itself, the heated one is what it uses to verify emissions efficiency (that the cat is working).

Post by **Pimperish1** » Fri May 04, 2018 1:00 am

A tutorial on this was just recently published on this. Try a search.

How to change Oxygen Sensor Bank 1

How to change Oxygen Sensor Bank 1

Re: How to change Oxygen Sensor Bank 1

Re: How to change Oxygen Sensor Bank 1

Re: How to change Oxygen Sensor Bank 1

Re: How to change Oxygen Sensor Bank 1

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