Hi all,

Offering a repair service for the dreaded 30ba / 30bb error code common on the following cars:

- Bmw 135i (n54 engine code)

- Bmw 335i (n54 engine code)

- Bmw 535i (n54 engine code)

- Any other models with the Msd80 Ecu.

Diagnostic reference: 30bb / 30ba DME digital motor electronics, internal failure

I replace all 6/4 components avoiding the risk of older parts failing. I decided to do this out of personal and customer experience.

This error causes the car to misfire in multiple cylinders and consume a lot more fuel than normal.

Replacement parts are an upgrade / latest revision.

****Please message me before purchasing to confirm this issue is related to the mosfets. ****

****Repairs can be done on the day. If you’re planning on popping down, please submit an offer of £70. If you’re sending it to me, please hit buy now and I’ll pay for postage back to you(around £11 special delivery). ****

Thank you :)