XSeries-forum

does anyone know if the battery terminal from e46 or e39 will work ok on my 2002 e53 ??
its all fixed now

E53 has a larger cable than the E46 so that's probably a no.  There is a repair kit, but it's :hypo: price wise ($500+)

E39 doesn't have one listed.  You need to go through Realoem and look at the different models to what might or might not be useable.

Have the seat belt pretensioners been triggered?  The part number for the pyro unit is only used on the E53 so sounds to be vehicle specific.

Richard

The high resistance on the seatbelt tensioners has come up before. The yellow plugs underneath the seats can develop bad connections so this will turn on the airbag light. Make sure the ignition is off. Keys out .
Look under the drivers seat and there is a yellow multiplug facing you, you have to move a bar at the side of the plug to disconnect the plug. Spray the connections with solvent contact cleaner ( not WD40 ! ) leave for 5 mins until it has dried, refit the plug back together. Repeat on the passenger seat.
Reset the airbag light.
It's a common problem on all cars with Airbags.
As for the battery terminal if it had been activated I would have thought it would be open circuit, so the car would not have any power to it, I believe you have to disconnect the negative lead first, so not to trigger the charge inside it, try checking the resistance with a meter to see if its faulty.
Maybe its breaking down under load. I'd be wary of messing with it as I believe it's got an explosive charge in it to disconnect the power in an accident. ( X5 Sport will know if that's the case, as he' the electrical Guru on here )

If you can still get it, Servisol, is a good contact cleaner.