Buy with your eyes open.
What to inspect, which faults to expect and what to ask the seller before you buy a used BMW.
E46 · E46 CSL BMW M3 (E46) buying guide The S54 engine and the rear of the body decide whether an E46 M3 is a good buy. Ask for proof of connecting-rod bearing work, inspect the trunk floor and rear subframe mounts for cracks, and check the rear wheel arches for rust. Prefer documented history over low mileage. Read the guide E92 · E90 BMW M3 (E90/E92) buying guide The S65 V8 is the reason to buy this M3 and the thing to check first. Ask for receipts for connecting-rod bearing work, test for throttle actuator faults and idle problems, and look for valve cover oil leaks. A car without bearing records should be priced as if the job still has to be done. Read the guide