Cars / Porsche 997 Carrera

Porsche 997 Carrera (2005–2012)

997.1 / 997.2 · 997.1: M96/M97 3.6/3.8 · 997.2: 9A1 3.6/3.8

Verdict: The 997 fixed the 996's looks and refined the chassis. On 997.1 cars, IMS and bore scoring (especially 3.8) define the buy; 997.2 drops the IMS but still needs a borescope.

At a glance

Risk 4/5 Market: 997.2 preferred; 997.1 needs paperwork

Must-have records:

IMS retrofit invoice (997.1)
Borescope report of all six cylinders
Clutch/RMS history
Oil-filter cut results

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Buy-risk rundown

Issue	Symptom	How to check	Typical cost (as of Nov 2026)
IMS bearing (997.1 Carrera, M96/M97)	Often none until failure; metal in the oil filter	Filter cut; specialist PPI; demand retrofit invoice	Retrofit ~$3,200–$4,600 standalone; ~$1,300–$2,200 with a clutch [1]
Bore scoring (esp. 997.1 3.8 Carrera S)	Oil use over ~1 qt/1,000 mi; cold-start tick; sooty one-bank exhaust	Borescope through spark-plug holes (all six)	Rebuild commonly ~$15,000–$25,000; PPI borescope ~$200–$400 [2]
Rear main seal (RMS) weep	Oil weep at the bellhousing	Inspect from below; monitor faint weep	Standalone ~$1,800–$2,800 labor; usually done with clutch/IMS [2]
Air-oil separator (AOS)	Smoke cloud on cold start; whistling vacuum; lean codes	Oil-cap vacuum test at idle	Parts+labor not yet verified on this page [2]

Cost figures checked against the sources below in Nov 2026. Bracketed numbers refer to the source list.

Notes

997.2 (2009–12) uses the 9A1 engine without an IMS; bore scoring is less common but still check [2][3].
Turbo/GT3 Mezger cars are a different checklist — this page covers Carrera-family engines.

Before you buy

Use our printable pre-purchase inspection checklist and get a PPI from a marque specialist.

Sources

Principe Repair & Performance, IMS failure & cost (accessed Nov 2026)
Bavarian Dismantlers, 997 PPI checklist (bore scoring, RMS, AOS) (accessed Nov 2026)
The Stable, 997.1 vs 997.2 buying guide (accessed Nov 2026)

Last updated 2026-11-05. Costs vary by region and shop.

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