Spokesman Miha Ernstscheinder says the module will detect "even the smallest deceleration forces". "It activates the brake light when it senses a deceleration greater than 4.1kmh/s (2.5mph)," he says. So it detects deceleration even before the brake switch activates the bike's brake light, whether they have standard bulbs, LEDs or HID lights. Sick and tired of your brake pad warning light coming on or not being able to turn it off even though your brake pads are like new? Mark shows you how to fix.... One of the ABS sensors in your BMW X1 may have failed, producing the brake light on your car's dashboard to flash. If this occurs, your ABS system will not work and you may encounter wheel lockup when braking, so be mindful until the issue is resolved. Ask Question Asked 3 years, 5 months ago. 3 series & 4 Series (E21, E30, E36, E46, E9x, F30, F32, F33, F36, F44) 1999 - 2006 (E46) E46 Won't start but cranks. mc16. Oct 23, 2011. On this vehicle the vacuum powered brake booster connects to the intake manifold through a 90° rubber elbow. The rubber had softened and swelled causing a major vacuum leak. This air sneaking in the back door raised combustion chamber temperatures. Ultimately failure of a $1.00 rubber elbow led to the destruction of my $75.00 bank 1 sensor.