HI, I HAVE A 2000 BMW 323i WITH 2.3 MOTOR (M52. THE CAR IS SHOWING MULTIPLE MISFIRE. I DID THE PLUGS, SWAP THE COILS AND NO LUCK. I ERASE THE CODES WITH A SCANNER AND THE CAR STARTED FINE BUT WHEN ITS RUNNING FOR 5 MINUTES OR MORE THE CHECK ENGINE LIGHT COMES ON. AND IT STARTS SHAKING.

SOURCE: 1999 BMW 323i shakes and rattles at low speed

Have your prop shaft bearing check

SOURCE: 2000 BMW 323i Check Engine Light Problem-10 codes!!! Help!

I would first check for a vacuum leak. Common areas of intake leaks are: 1. The crankcase vent valve located under the intake. 2.Check the intake boot at the throttle housing. You will find that there is an elbow where a small hose goes to your idle valve. Using your hand feel in the elbow area for a hole in the rubber. Your tech can use brake cleaner and spray the intake to check for leaks or use a smoke tester. 3.Possible failing Mass Air Meter.At idle, in park, and a/c not on the meter reading should be appr. 18-22 hz

SOURCE: 1999 bmw 323i dashboard reads S and car wont turn over

check for power on the small wire on the starter with the key in the start position, if you have power, replace the starter

SOURCE: 2000 bmw 323i-shakes and clanking

hey man, i had the same problem with my 325i (clankins sound on cold start-up) i took it to the dealership to have a look they diagnosed it wrong telling me a pulley is cracked and quoted me a ridiculous amount to fix it so, i decided to have a look 4 myself and i found that a pulley was loose the pulley looks similar to that of a cog of a bike it has 1 bolt in the center, that bolt was loose so all i did was tighten it and it solved the clanking sound , give it a shot it might work for you.

SOURCE: Hi I have 2000 BMW 320i. Lumpy idle when cold and oil light for

Your oil is a little low, and the timing may be off a bit but if it smooths out after warm it is probably ljust
low oil.