early m20 ignition coil same as '91 535i?

[tim eh?]

I think I need to change this ignition coil - urgently!







It must be the original as realoem shows this one as "ended" for my car.

A 06/89 build m20 uses a cylinder coil here on realoem

However, a '91 535i m30 uses the same part as I have which has been replaced by another one.


At least it should fit right? For the cylinder one I would have to redo the wiring.

I tested it according to bentley it reads normally except secondary resistance [15(+) to centre tower] reads 9.0k ohms instead of 6.0...

But the symptoms are classic weak spark symptoms and I already replaced the distributor and rotor... probably way way way past due on the wires, too.

I can check those tonight - they look ok but looking good doesn't mean a thing to anyone in -20'C.

damn they are expensive - at least $100CAN for the coil and I bet $200CAN+ for the wires - and I read this thread on bosch wires as being crappy now, so what do you guys say - should I go for the 535i bosch coil and bosch wires or something else?

(as you can see, A/C remains low on my priority list )