Reliability Guide

Common Problems with the
2005 Chrysler 300C

The 300C arrived in the UK in 2005 with the Mercedes OM642 3.0-litre diesel V6 and a 5.7-litre Hemi V8. Early cars had the best equipment but are now the oldest and most likely to show suspension and electrical age-related issues.

What changed for 2005

  • UK launch with 3.0 CRD diesel and 5.7 V8 Hemi
  • Mercedes W211-derived suspension
  • Distinctive American styling

Common MOT watch-outs

  • !Suspension bush and ball joint wear on heavy body
  • !Corroded brake pipes
  • !Inlet manifold corrosion on early diesels (2005–2007)
4
Known Issues
2
Serious
2
Moderate
0
Minor

All Known Issues

Swirl Motor Failure (3.0 CRD)

SeriousEngine

Oil leaks from the turbocharger intake pipe can drip directly onto the swirl flap motor located in the "V" of the engine, causing it to short out and put the car into limp mode.

Est. Repair Cost: £400–£700

Inlet Manifold Corrosion (2005–2007 Diesel)

SeriousEngine

On early 300C diesels, the inlet manifold can corrode internally and suck plastic fragments into the engine, causing potentially catastrophic damage. Cars built between 2005 and 2007 are most affected.

Est. Repair Cost: £400–£1,200

Suspension Bush & Ball Joint Wear

ModerateSuspension & Chassis

The 300C is a very heavy car, and its suspension components (derived from the Mercedes W211) take a beating on UK roads. Ball joints and control arm bushes often last less than 40,000 miles.

Est. Repair Cost: £300–£800

Alternator Failure

ModerateElectrics & Electronics

The alternator is prone to premature failure, often caused by diesel fuel dripping onto it from cracking rubber fuel hoses. The earth cable can also corrode, leaving the car unable to start.

Est. Repair Cost: £300–£700

Buying Tips for 2005 Chrysler 300C

  • Check for inlet manifold cracking on 2005–2007 diesels — fragments can destroy the engine
  • Listen for front suspension knocking over bumps
  • Verify the alternator is charging correctly