Ford F-150 Brake Shift Interlock Actuator 7L3Z-7E096-A

This is the brake transmission shift interlock (BTSI) actuator for the 2004-2014 Ford F-150 and 2006-2008 Lincoln Mark LT with the automatic transmission. It replaces Ford 7L3Z-7E096-A, 4L3Z-7E096-AA and 4L3Z-7E096-AB and the aftermarket 609-039, the part covered by Ford TSB 05-06-10. The actuator comes with its wiring pigtail and connector and the indicator bulb socket, so it plugs into the factory harness.

The BTSI is the solenoid that holds the shifter in Park until you press the brake pedal. When it fails, the classic complaint is a shifter that will not come out of Park even with the brake pressed and the brake lights working. It can also fail the other way and let the shifter move out of Park without the brake. A clicking sound when you press the pedal with nothing happening, or a shifter that only releases sometimes, points to this part too. Check the brake lights and the brake pedal switch first, because the actuator only releases when it gets the brake signal.

To move the truck in the meantime, use the shift lock override. To replace it, disconnect the battery, remove the trim covering the shifter mechanism, unplug the old actuator and release it from its mount, and note how the harness is routed. Install the new actuator in the same position, route and clip the harness the same way, reconnect, and test that the shifter stays locked in Park without the brake and releases every time with it.