— Cayman / Boxster · Mid-Engine
Published
August 4, 2026
5 min read
Rev'd MotorWerks
Cayman and Boxster share their engine family with the 911, which means the IMS bearing conversation that early 911 owners hear about applies here too — with a few platform-specific details worth knowing.
The intermediate shaft (IMS) bearing supports a shaft that helps drive the camshafts inside the flat-six engine. On certain model years, that bearing can wear prematurely and, in rare cases, fail — allowing debris into the engine and causing serious internal damage.
The original 986 Boxster (1997–2004) and early 987 Cayman/Boxster (2005–2008) share the same engine family and IMS bearing designs as the equivalent-era 911. Risk level depends on the specific bearing design used in a given model year — the same single-row/dual-row distinction that applies to the 911 applies here.
Worth Knowing
Because Cayman and Boxster share the engine family with the 911, the same inspection approach applies — this isn't a separate or lesser-known issue, just one that gets talked about less because these cars get less attention overall.
We identify your specific engine's IMS bearing design from the VIN and build date, then recommend either an oil analysis or a borescope inspection — both non-invasive ways to check current condition without removing the engine or transmission.
We can check your VIN and recommend the right inspection for your specific car.
Yes — Cayman and Boxster share the same engine family as the 911, so early models can be affected by IMS bearing wear. We inspect and advise based on your specific model year.
Yes, with a proper inspection first. A pre-purchase inspection that includes oil analysis or a borescope check will tell you exactly where the bearing stands before you buy.
