1990 BMW 325is AutomaticFACTORY OEM SERVICE PROCEDURE

Timing Belt Interference Check Menu

TIMING BELT INTERFERENCE VERIFICATION (1)

Application Engine Replacement Interval (Miles)
325 series
1982-91 (2) 2.5L 6-Cyl 60,000
1982-91 (2) 2.7L 6-Cyl 60,000
325ic
1992 (2) 2.5L 6-Cyl 60,000
525i
1989-91 (2) 2.5L 6-Cyl 60,000
525iA
1989-91 (2) 2.5L 6-Cyl 60,000
528e
1982-88 (2) 2.5L 6-Cyl 60,000
1982-88 (2) 2.7L 6-Cyl 60,000
(1) Other interference engine applications may exist which are not indicated here.
(2) Interference engine. Check for possible damage to piston(s) or valve(s) if there has been a timing belt failure.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.