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Common Problems with the
2004 Porsche 911 (997)

We've identified 1 known issue that can affect the 2004 Porsche 911 (997). 1 of these are serious faults that could be expensive to repair.

1
Known Issues
1
Serious
0
Moderate
0
Minor

The 2004 period has an average number of reported issues compared to other Porsche 911 (997) year periods.

All Known Issues

Bore Scoring (Gen 1)

SeriousEngine

The Lokasil/Alusil cylinder liners degrade, causing the piston to score the walls. Eventually requires a full rebuild.

Most affected: Carrera S (3.8), Carrera (3.6)

Estimated cost: £8,000–£12,000 (rebuild)Affects: 2004–2008Often appears around: 40k-80k miles

Typical symptoms

  • •Ticking noise at idle
  • •High oil consumption
  • •Sooty left exhaust tip

What to inspect before you buy

  • ✓Get a specialist bore scope inspection
  • ✓Listen for a rhythmic "slap" when warm

Buying Tips for the 2004 Porsche 911 (997)

  • ✓On 997.1 models, check if an IMS retrofit or a larger factory bearing is fitted.
  • ✓Look for sootier residue on the left exhaust tip, which can be an early sign of bore scoring.
  • ✓Verify the operation of the PASM dampers; leaking struts are common on S models.
2005–2008 Porsche 911 (997)

Browse 2004 Porsche 911 (997) in our Directory

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View 2004 Directory

Other Porsche 911 (997) Year Periods

20042005–20082009–2012

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