Initially available as 4-door sedan, 2-door coupe introduced 1992, 2-door convertible, and 3-door "Compact" (hatchback) introduced in 1994. Compact models share engines and front suspension but use inferior rear suspension from the earlier E30 model.
M40 engines had a timing belt and require regular replacement, but all other engines have timing chains.
M40 engine suffers from top-end wear and was replaced by the superior M43 engine in 1996.
M50 engines from 1992 and M52 engines had variable valve timing, which can require extra maintenance.
M52 engine can consume oil due to engine wear or PCV system components.
M3 can be equally reliable but parts and maintenance costs are often much more than other models. The S50 engines can also suffer from variable valve timing system issues and rod bearing failure can occur, although not as common place as later "M" engines.
M42 and M44 (318is and 318ti) engines are mostly reliable and maintenance requirements are minimal.
All engines regular cooling system component replacement and chassis requires regular suspension component replacement, such as ball joints and rubber bushes.
Automatic transmissions in 4 cylinder models can be problematic.
Big enthusiast following means there is plenty of help available online, and popularity ensures cheaper aftermarket parts suppliers.
Most models require premium unleaded.
Image credit: OSX, Public domain, via Wikimedia Commons
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