I have learned from many this is very very common failure. No safety defect mentioned. *Ak
Engine & cooling
Nissan D21 Engine problems by year
2 complaints filed with NHTSA about the Nissan D21's engine & cooling. Stalling, loss of power, oil consumption, overheating, head gaskets, timing chains and engine failure.
Engine complaints by model year
Latest D21 engine complaints
EXHAUST MANIFOLD MOUNTING STUDS FAILURE.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data