Common e30 replacements

[Ceeker]

Check door harness to body for corroded pin connectors

[BAVARIAN IRON]

replace

o2 sensor

[MattM]

I'd say since you're replacing all those things, might as well do the headgasket too. Get it done once and get it done right. That way you'll never have to deal with it when you least expect to. It'll teach you a nice lesson in how simple it is to disassemble your motor as well. And if you own an 88+ E30, rewire, if it looks to be in bad condition, your C191 connector (fuel injector harness), so your car will be running at 6cylinders all the time!

Dont fix what aint broke.... with these cars if you start digging as far as a headgasket you may get in over your head VERY quickly(cost and/or skill wise)....for something not even needed in the first place....

[riceh8r]

+1 on 02 sensor. you have a bad ground is my $.02 on your electrical probs.

[sgb]

Steering rack

[KirkerBezerker]

Rear subframe bushings.

[BrettsE30]

Rebuild your shifter. If it's 5 speed obviously

[Matt-B]

crank position sensor is a good one

crank and cam sensor, when i had my m42 car, i had filters etc sensors, sitting on the shelf,

EDIT head gasket kit, intake gasket, VC gasket etc

Oil pan gasket