1998 BMW 540I

The 1998 BMW 540I sits at the peak of a sharp complaint surge that began with the 1997 model year, recording 26 complaints and 20 TSBs against 1997's 27 complaints and 21 TSBs — a dramatic escalation from the single-digit complaint counts and minimal TSB activity seen across 1990–1995. Engine & Engine Cooling dominates the 1998 profile with 16 of 26 complaints, while Latches/Locks/Linkages and Structure each account for two, and Air Bags for one; the data does not specify root causes for any category. Recalls remain low at one for 1998, consistent with 1999's single recall but below the four recalls issued for 1994 and 2001. The 1999 model year shows meaningful improvement, with complaints falling to 22 and TSBs halving to 10, suggesting the 1997–1998 spike was a transient production or design issue rather than a persistent generational flaw. With no crash or fire complaints recorded for 1998, the safety risk appears contained to reliability and convenience systems. This is a borderline purchase year: the elevated complaint and TSB volume warrants a thorough pre-purchase inspection focused on the cooling system and door/lock hardware, but the rapid improvement in 1999 and absence of severe safety events mean a well-documented, maintained example can be acceptable.