The 911 Carrera (996.1) is the rear-wheel-drive base 911 of the first water-cooled generation, built for 1998–2001 (US from 1999). It dropped the air-cooled flat-six that had defined the 911 since 1963 for the water-cooled M96 3.4-liter unit, and shared its front structure, headlights and much of its interior with the 986 Boxster — the source of its divisive "fried-egg" teardrop headlights. It drives through a standard six-speed Getrag manual or an optional five-speed Tiptronic S.
The 996's reputation for fragility is almost entirely about this M96 engine: the sealed IMS bearing, weeping rear main seal, and bore scoring or cracked liners. It matters which year: the 1998–1999 cars use the sturdier dual-row IMS bearing, and Porsche only switched to the weaker single-row unit around MY2000, so the earliest 996.1s are ironically among the lower-risk M96s.
US NHTSA campaigns for this model. A listed campaign may not apply to a particular car, and may already have been remedied — check a specific car by VIN at nhtsa.gov/recalls.
Not a recall. Porsche never recalled the IMS bearing; it settled a US class action (Eisen v. Porsche) in 2013 that reimbursed IMS repairs, but only for 2001–2005 cars. That leaves most 996.1s — the 1998–2000 model years — outside the coverage, so budget for the fix yourself and treat a documented retrofit as a plus.
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