Common Problems with the
2005–2008 Porsche Boxster / Cayman (987)

We've identified 4 known issues that can affect the 2005–2008 Porsche Boxster / Cayman (987). 2 of these are serious faults that could be expensive to repair.

4
Known Issues
2
Serious
2
Moderate
0
Minor

The 2005–2008 period has 3 more issues than the Porsche Boxster / Cayman (987) average across all year periods.

All Known Issues

Bore Scoring (987.1)

SeriousEngine

3.2 and 3.4 engines are at risk, requiring expensive specialist rebuilds.

Most affected: Boxster S 3.2, Cayman S 3.4

Estimated cost: £7,000–£10,000Affects: 20052008Often appears around: 40k-80k miles

Typical symptoms

  • Ticking at idle
  • Oil consumption
  • Sooty exhaust

What to inspect before you buy

  • Bore scope inspection is highly recommended

IMS Bearing (987.1)

SeriousEngine

The intermediate shaft bearing on early 987.1 models (2005-2008) shares the same risk as the 996/997.1. The 987.2 (2009+) eliminated the IMS bearing entirely.

Most affected: Boxster 2.7, Boxster S 3.2, Cayman 2.7, Cayman S 3.4

Estimated cost: £1,500–£2,500 (preventative)Affects: 20052008Often appears around: 30k-70k miles

Typical symptoms

  • Metal debris in oil filter
  • Oil leak near rear main seal
  • Sudden engine failure

What to inspect before you buy

  • Ask if IMS upgrade has been fitted
  • Inspect oil filter for metal particles

Radiator / Condenser Corrosion

ModerateCooling System

Front intakes collect leaves and road salt, rotting the cooling components.

Most affected: All models

Estimated cost: £600–£1,200Affects: 20042012Often appears around: Age-related

Typical symptoms

  • Weak AC
  • Sweet coolant smell
  • Visible rot in front grilles

What to inspect before you buy

  • Inspect front grilles for debris

Clutch Wear (Manual Models)

ModerateGearbox & Transmission

The clutch on manual models can wear prematurely, especially with spirited driving. A stiff clutch pedal or clicking noises from the transmission are telltale signs.

Most affected: Manual models

Estimated cost: £750–£1,200Affects: 20042012Often appears around: 40k-80k miles

Typical symptoms

  • Stiff clutch pedal
  • Gear change clicking
  • Slipping clutch under load

What to inspect before you buy

  • Test clutch bite point
  • Listen for clicking from rear of car during gear changes

Buying Tips for the 2005 Porsche Boxster / Cayman (987)

  • Focus on 987.2 models (2009+) if budget allows, as they lack the IMS bearing.
  • Inspect front radiators with a torch; they are prone to stone damage and rot.
  • Listen for "clonks" from the front suspension, often indicating worn coffin arms.

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