523 I Se

[stef.s]

Hi first time on a forum got a couple of questions first I have an intermittent emissions fault done the usual changed plugs checked coil packs and changed o2 sensors problem still occurs

Secondly will a bmw radio from a 325 fit in a 523 without modifying anything thks

[Mtech79]

Hi

More than likely an air leak on an e39, and no the stereos won't interchange

I'm afraid.

[stef.s]

Thks for reply fault codes showing up now are misfire on cylinders 1 & 3 and o2 sensors bank 1 sensor 2 and bank 2 sensor 2 checked for air leaks none found

[Bimmer Owners Club]

Welcome to the forum, stef.s! Sorry to hear about your problem, hopefully someone on here can help you. If you have problems with forums, send me a message. :)

[Mtech79]

Sounds weird, basically cylinders 1,2 & 3 are your bank 1

And 4,5 & 6 are bank 2, so can understand the O2 sensor on bank 1

Picking up a fault if you have a miss on 1 & 3, but bank 2 readings should be ok

Sensor 2 is just a reading sensor as sensor 1 on each bank is the signal sensor.

Guess if uve done the plugs and coils, and you're getting a spark through the plugs

And no air leaks, ull need to compression test the cylinders and check the fueling side ie injectors