[Poleposition]

Anyone have any experience with the o2 sensor spacers? I just need them to pass inspection than can remove. Looking for a recommendation on which ones to buy.
Thx

[pbonsalb]

Unlikely they will work. The mini cat 02 might but I tried them once on an older BMW and they did not work (2008 M3). Swap primary cars back in or get a tune. The only primaries that I have read might work are FI, which have a mini cat within the 02 bung inside.

[GranitM5]

Originally Posted by pbonsalb

Unlikely they will work. The mini cat 02 might but I tried them once on an older BMW and they did not work (2008 M3). Swap primary cars back in or get a tune. The only primaries that I have read might work are FI, which have a mini cat within the 02 bung inside.

A tune will turn off sensors for cats and won’t pass. Unless you know someone. That was my issues with my W204 C63. Had to register my car in PA (no OBD scan) in order not to go back to stock.

[pbonsalb]

Maybe NY is different in how it inspects, but plenty of M5 owners pass OBD2 plug inspection with tunes. However many USA based tuners will not simulate the rear 02 in the tune because it is illegal and the EPA has fined some tuners.

If you have BM3, have you enabled the rear 02 simulation? If you have another program, I would not be familiar with it. JB4 stopped offering rear 02 simulation a few years ago in the USA market.

Have you checked with a scan tool to verify you do not have rear 02 readiness monitors set?

[S EyeLand]

Originally Posted by GranitM5

A tune will turn off sensors for cats and won’t pass. Unless you know someone. That was my issues with my W204 C63. Had to register my car in PA (no OBD scan) in order not to go back to stock.

This is wrong. He will pass in NY, I've passed for 12 years running with this setup. on 4 catless M cars. All random shops.