Abbreviations

A

 * ABS: Anti-lock Brake System (part of ESP/ESC)
 * ASR: Anti-Slip Regulation a.k.a. Traction control (part of ESP/ESC)

B

 * BMC: Brake Master Cylinder
 * BOV: Blow Off Valve
 * BPV: ByPass Valve
 * BSC: Brake Slave Cylinder

C

 * CAN: Controller Area Network
 * CEL: Check Engine Light
 * CF: Correction Factor
 * CMC: Clutch Master Cylinder
 * CSC: Clutch Slave Cylinder

D

 * DV: Diverter Valve
 * DTC: Diagnostic Trouble Code
 * DTS: DriveTrain Stabilizer (a.k.a Transmission Stabilizer Bar)

E

 * EBC: Electronic Boost Controller
 * EBD: Electronic Brake distribution (part of ESC/ESP)
 * ECU: Electronic Control Unit
 * ECUx: APR's ECU Explorer
 * EDL: Electronic Differential Locking (part of ESC/ESP)
 * EFK: Electric Fan Kit
 * EGR: Exhaust Gas Recirculation
 * EGT: Exhaust Gas Temperature
 * EMS: Engine Management System
 * ESC: Electronic Stability Control (aka ESP)
 * ESP: Electronic Stability Program - consists of ABS, EBD, ASR, EDL, MSR etc.
 * ETC: Electronic Throttle Control (a.k.a "drive-by-wire")

F

 * FMIC: Front Mount InterCooler
 * FPR: Fuel Pressure Regulator

I

 * IAT: Intake Air Temperature
 * IC: InterCooler

K

 * KV: Knock Voltage

L

 * LSD: Limited Slip Differential
 * LTFT: Long Term Fuel Trim
 * LWFW: Lightweight Flywheel

M

 * MAF: Mass Air Flow
 * MAP: Manifold Air Pressure
 * MBC: Manual Boost Controller
 * ME7.1: Motronic system (with ETC) version 7.1
 * MSR: Motor Slip Regulation a.k.a. Engine Drag Torque Control (part of ESC/ESP)
 * MY: Model Year

O

 * OBD II: On-Board Diagnosis - stage II
 * OEM: Original Equipment Manufacture/Manufacturer

P

 * PCV: Positive Crankcase Ventilation

S

 * SAC: Self-Adjusting Clutch
 * SMIC: Side-mount Intercooler
 * STFT: Short Term Fuel Trim

T

 * TB: Throttle Body
 * TBB: Throttle Body Boot
 * TC: Throttle Cut
 * TCD: Throttle Cut Defender (a.k.a "MAP clamp")
 * TCU: Transmission Control Unit
 * TDC: Top Dead Center
 * TIP: Turbine Inlet Pressure
 * TRE: Tie Rod End
 * TSB: Technical Service Bulletin
 * TSB: Transmission Stabilizer Bar (a.k.a. "Drivetrain Stabilizer")

V

 * VAG: Volkswagen Audi Group
 * VVT: Variable Valve Timing

W

 * WOT: Wide Open Throttle