BSA Brake system analysis, product name for brake test stand (Bosch). BRP Wideband noise test, method for testing potentiometers. Temperature at which paraffin crystals precipitate out of dieseluel. BOU Brake operating unit, controls and activates the brakes. BHKZ Battery high voltage capacitor ignition. BG Brake assembly, integrated ABS, or Bulgaria. BEA Bosch Emissions Analysis, product name for exhaust-gas tester (Bosch) BEV. BDM Petrol/diesel speed measurement module. BA Acceleration sensor or Brake assistant (Mercedes Benz). Rear-axle limited-slip differential (Mitsubishi). AWS Evaluation switching unit (Bosch KH). AWK Spare piston, used if proper piston does not function. ATF Exhaust-gas temperature sensor or Automatic transmission fluid. ASV Air switching valve, air intake valve or Trailer control valve. AS-T Exhaust-gas sensor for temperature. ASR 2 Transmission slip control, separate, system name, proper name ASR 3. ASR Transmission slip control, usually proper name. ASP Shutoff valve for ASR brake control. AS-NO Exhaust-gas sensor for NOx (nitrogen oxide) content. ASMS Automatic stability management system. ASM Asynchronous machine Alarm Siren Module. ASG Attachment control unit or Semi-automatic transmission. ASF Audi Space Frame, special construction for aluminium frame in Audi A2 and A8. ASC+T Automatic stability control, regulated force transmission with traction control ASD. ASC Automatic stability control, controlled force transmission. AS Air intake or Towing protection or South America. ARMADA Triggering unit for restraint systems with external differentiated triggering. System actively influences the intake noise, reducing it by about 15 dB. AMIC Automotive Multimedia Interface Collaboration. ALWR Automatic headlight vertical aim control. ALV Axle load distribution (drive-off aid). ALU Arithmetic and logic unit (microcomputer), proper name. ALFB Atmospheric pressure and load-dependent start-of-delivery. ALDA Absolute measurement, boost-pressure dependent full-load stop ALDL. ALB Automatic load-dependent braking force control. AICC Autonomous intelligent cruise control (speed and distance). AHK AHM Trailer coupling, or Active rear-axle kinematics Auxilliary Heater Module. Variable light distribution via movable reflectors