There are 2 stored owner reports matching the powertrain & transmission leading-label group for the 2005 Porsche Boxster in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)TL* THE CONTACT OWNS A 2005 PORSCHE BOXSTER. THE CONTACT WAS UNABLE TO DRIVE THE VEHICLE BECAUSE THE IGNITION KEY WAS LOCKED INSIDE THE IGNITION. THE CONTACT TOOK THE VEHICLE TO A CERTIFIED MECHANIC WHO DIAGNOSED THAT THE TRANSMISSION FAILED AND NEEDED A CABLE ADJUSTMENT WITH THE TRANSMISSION AND THE KEY. THE CONTACT STATED THAT THE FAILURE WAS DIRECTLY RELATED TO NHTSA CAMPAIGN NUMBER: 03V004000 (POWER TRAIN); HOWEVER, THE VEHICLE WAS NOT INCLUDED IN THE RECALL. THE MANUFACTURER WAS MADE AWARE OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE WAS 47,000.
PULLING AWAY FROM A GREEN LIGHT IN TRAFFIC, THE ENGINE STARTED TO UPSHIFT INTO A HIGHER GEAR MUCH SOONER THAN NORMAL AND THE CAR FELT DOWN ON POWER. THE ENGINE SOUNDED AS THOUGH IT WAS RUNNING ON FEWER THAN NORMAL CYLINDERS. I STOPPED THE VEHICLE IMMEDIATELY & HAD IT TOWED TO A PORSCHE SPECIALIST. THEY TOLD ME IT WAS AN IMS (INTERMEDIATE SHAFT) BEARING FAILURE AND THAT IS WAS A KNOWN PROBLEM WITH M96 AND M97 PORSCHE ENGINES. MINE BEING AN M96 ENGINE. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.