1988 BMW 325is AutomaticFACTORY OEM SERVICE PROCEDURE

Throttle Position Switch

The throttle position switch is located on the intake manifold near the throttle valve. The throttle position switch it detects the position of throttle valve. This information is converted into an electrical signal and is sent to the MCU. The MCU interprets the signal as either full throttle, idle or normal operating condition and makes adjustments accordingly.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

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When to See a Mechanic

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

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

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