Engine and Transmission Issues:
* 5.7L Hemi Engine: While powerful, this engine could suffer from issues like valve seat recession (leading to ticking noises and potential engine failure), lifter tick, and oil consumption. These are often linked to the use of improper oil or lack of maintenance.
* Transmission Problems: The 5-speed automatic transmission (NAG1) in some models was prone to shifting problems, rough shifting, and even complete failure. This was a significant issue for many owners. This is particularly true if the transmission fluid wasn't regularly changed.
* Electrical Issues in Engine System: Various sensor failures (like the camshaft position sensor) could lead to rough running or starting problems.
Electrical Problems:
* Electrical gremlins: A general complaint was inconsistent electrical problems. Things like the radio, power windows, or other electronics could malfunction intermittently. These are often difficult to diagnose.
* Alternator failures: Alternator failure was also relatively common, leaving owners stranded.
Suspension and Steering:
* Suspension components: Various suspension components, like bushings and ball joints, could wear out prematurely, leading to clunking noises and a rougher ride.
* Steering issues: Some owners reported issues with the power steering system.
Other Issues:
* Paint and rust: The paint quality was sometimes criticized, and some cars experienced rust problems, particularly in areas prone to salt.
* Interior issues: Some owners reported problems with interior trim pieces breaking or wearing out prematurely.
* ABS/Brake issues: Some owners reported problems with the anti-lock braking system (ABS) or other brake components.
Important Note: The frequency and severity of these problems varied depending on maintenance, driving style, and individual vehicle condition. Regular maintenance is crucial to mitigate these issues. A well-maintained 2006 300C can still be a reliable vehicle. However, potential buyers should be aware of these potential problems and have a thorough pre-purchase inspection performed.
