Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMERCURY2009MILAN PREMIER, 3.0 1, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1417 (AUTOMATIC TRANSMISSION EXTERNAL CONTROLS)DESCRIPTION & OPERATIONEXTERNAL CONTROLS - FLOOR SHIFTBRAKE SHIFT INTERLOCK SYSTEM
2009 Mercury Milan Premier, 3.0 1, AWD
Brake Shift Interlock System
2009 Mercury Milan Premier, 3.0 1, AWDSECTION Brake Shift Interlock System
WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
The shift interlock system consists of:
- a brake shift lock actuator (BSIA).
- A transmission BSIA, which clips to the actuator retainer, securing the shift lock actuator to the steering column.
- A BSIA cable, which routes to the floor console mounted selector lever assembly lock mechanism.
- electrical circuits to supply power to lock and unlock the BSIA.
The BSIA locks the selector lever in PARK:
- when the ignition switch lock cylinder is in the LOCK position.
- with the ignition switch lock cylinder in the RUN position and the brake pedal released.
The BSIA releases the selector lever:
- with the ignition switch lock cylinder in the RUN position and the brake pedal actuated.
RENDER: 1.0x
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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.