IMSchecker – IMS & Bore Score Checker

Porsche IMS Checker

Discover whether your Porsche has the original bearing in place or if its been upgraded.

Relevant PODCASTS

What’s the IMS bearing?

The IMS (Intermediate Shaft) bearing is a small but critical component inside certain Porsche 911 engines, most notably some 996 and early 997 models.

Its job is to:
- Drive the engine’s camshafts
- Keep valve timing precise
- Allow the engine to run smoothly and reliably

Although it’s a relatively small part, it plays a central role in how the engine operates.

Why this site exists

When buying a pre-owned 911, IMS work is often:

- Claimed but not proven
- Mentioned verbally without paperwork
- Lost in old service history

This site exists to provide:
- Document-backed verification
- Clear, factual status for each car
- Confidence for both buyers and sellers

No opinion. Just evidence.