IsItAGoodCar
Reliability Guide

Common Problems with the
2006–2007 Chrysler 300C

We've identified 4 known issues that can affect the 2006–2007 Chrysler 300C. 2 of these are serious faults that could be expensive to repair.

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
Warning Signs:

Limp mode (limited power), Electronic Throttle Control (ETC) light, Engine management light

What to Inspect:
  • Check for oil residue around the turbo inlet
  • Ask if a "resistor mod" or swirl motor bypass has been fitted
Verified by IsItAGoodCar Research Team

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
Warning Signs:

Loss of power, Engine management light, Metallic rattling from engine, Engine damage if fragments ingested

What to Inspect:
  • Check if the original inlet manifold has been replaced
  • Ask about any engine damage history
  • Listen for unusual engine noises
Verified by IsItAGoodCar Research Team

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
Warning Signs:

Knocking over speed bumps, Vague steering, Uneven tyre wear

What to Inspect:
  • Service history for suspension work
  • Listen for knocks during test drive
  • Inspect front tyres for inner edge wear
Verified by IsItAGoodCar Research Team

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
Warning Signs:

Battery warning light, Car failing to start, Dimming lights, Electrical glitches

What to Inspect:
  • Check the alternator output voltage
  • Inspect fuel hoses near the alternator for leaks
  • Check the earth cable for corrosion
Verified by IsItAGoodCar Research Team

Buying Tips for 2006–2007 Chrysler 300C

  • ✓Check the front suspension for knocking sounds over bumps, as lower control arms and tie rod ends wear out frequently.
  • ✓On the 3.0 CRD, look out for the "swirl motor" failure; check for an engine management light and sluggish performance.
  • ✓Test all interior electronics, particularly the air conditioning blend doors, which can fail and blow hot air on one side.
  • ✓Inspect the alloy wheels for extensive corrosion, a very common issue on UK cars exposed to road salt.
  • ✓Verify the automatic transmission fluid has been changed; neglected gearboxes can become jerky or get stuck in limp mode.
  • ✓Check the propshaft centre bearing for vibrations under hard acceleration.
20052008
Check a 2006–2007 Chrysler 300C by Registration