IMS Bearing Lookup

Check whether your M96 engine has a double row or single row IMS bearing by engine number. Double row is stronger; single row has a higher failure rate.

Where to find the engine number

Viewed from the rear of the car, the engine number is stamped on top of the left-front bolt of the engine oil pan.

Engine number location on M96 engine oil pan, view 1
Photo 1
Engine number location on M96 engine oil pan, view 2
Photo 2

Reference cutoffs

  • 996.1 3.4L — up to M 66114164 = double row; from M 66114165 = single row
  • 996.2 — all single row
  • Boxster 2.7L M96.22 — up to M 65112851 = double; from M 65112852 = single
  • Boxster 3.2L M96.21 — up to M 67111237 = double; from M 67111238 = single

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