2005–2008 Porsche 911 (997)
Browse our directory of 2005–2008 Porsche 911 (997) vehicles. Access instant MOT history reports, tax status, and reliability insights for any registration listed below.
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Common Problems & Reliability
The 2005–2008 Porsche 911 (997) has 3 known issues. 2 of these are classified as serious faults that could be expensive to repair. 1 are moderate concerns worth inspecting before purchase.
Bore Scoring (Gen 1)
SeriousThe Lokasil/Alusil cylinder liners degrade, causing the piston to score the walls. Eventually requires a full rebuild.
Symptoms: Ticking noise at idle, High oil consumption...
Est. repair cost: £8,000–£12,000 (rebuild)
IMS Bearing (997.1)
SeriousWhile the 997.1 uses a larger bearing than the 996, early 2005 models still use the smaller bearing. Later 997.1 cars use a larger, more robust bearing but failure is still possible.
Symptoms: Metal debris in oil filter, Oil leak near rear main seal area...
Est. repair cost: £1,500–£2,500 (preventative)
Cracked Ignition Coil Packs
ModerateThe coil packs on 997 engines are prone to cracking and failing, causing misfires. A relatively inexpensive fix but common across all variants.
Symptoms: Engine misfire, Check engine light...
Est. repair cost: £200–£400
Buying Tips for the 2005–2008 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.
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