I think it is a good idea for us to get a thread going on acronyms. I will start it out (update as well) and if we get enough input we can get a sticky in place. Noobs like me will thank you.
OP - Original Poster
Aftermarket
JDM - Japanese Domestic Market
General Automotive
OEM - Original Equipment Manufacturer
OE - Original Equipment
GVW - Gross Vehicle Weight
GVWR - Gross Vehicle Weight Rating
HP - Horsepower
IGN - Ignition
LVW - Loaded Vehicle Weight
RPM - Revolutions Per Minute
V6 - V-Formation Six-Cylinder
V8 - V-Formation Eight-Cylinder
4WD - Four Wheel Drive
SS - Stainless Steel
Ti - Titanium
Al - Aluminum
Si - Silicon
H2O - Agua
NOX - Nitrogen oxide
CO - Carbon monoxide
TSB - Technical Service Bulletin
GB - Group Buy
Braking
BBK - Big Brake Kit
ABS - Anti-lock Braking System
PB - Power Brakes
EBD - Electronic Brake-force Distribution
Drivetrain
LWFW - Light Weight Fly Wheel
SMF Single Mass Flywheel
DMFW - Dial Mass Fluwheel (OEM)
DSG - 7 speed DL501 trans
ZF - 8 speed torque converter trans
6MT - 6 Speed Manual
CDV - Clutch Delay Valve
AWD - All Wheel Drive
CVT - Continuously Variable Transmission
DCT - Dual-clutch Transmission
DSG - Direct-shift Gearbox
FWD - Front-wheel Drive
N2O - Nitrous Oxide
VVT - Variable Valve Timing
RSB - Rear Sway Bar
FSB - Front Sway Bar
LSD - Limited Slip Differential
Engine
DP - Dual Pulley
SC - Supercharger
CEL - Check Engine Light
VCDS - VAG-COM diagnostic system
IC - Intercooler
TB - Throttle Body
ECU - Engine Control Unit
NOT - Normal Operating Temperature
IAT - Intake Air Temperature
KNK - Engine Knock
AFR or A/F - Air Fuel Ratio
CAI - Cold Air Intake
EPC - Electronic Power Control
DOHC - Dual Overhead Cam
EAT - Electronically Assisted Turbocharging
EFI - Electronic Fuel Injection
EWP - Electric Water Pump
ICP - Intake Cam Phaser
TBI - Throttle Body Injection
HPFP - High Pressure Fuel Pump
LPFP - Low Pressure Fuel Pump
STFT - Short Term Fuel Trim
LTFT - Long Term Fuel Trim
TFSI - Turbo Fuel Stratified Injection
MIL - Malfunction Indicator Light
ECA - Ethanol Content Analyzer
MAF - mass air flow
MAP - manifold absolute pressure
AWIC - air to water intercooler
Exhaust
DP - Downpipes
TP - Test Pipes
EGR - Exhaust Gas Recirculation
EGT - Exhaust Gas Temperature
CB - Cat-back
CBE - Cat-back Exhaust
Exterior
Interior
FBSW/FBW - Flat Bottom Steering Wheel
MMI - Audi's "Multi Media Interface"
A/C - Air Conditioning
Lighting
HID - High Intensity Discharge aka Xenon
DRL - Daytime Running Lights
LED - Light Emitting Diode
Maintenance
AC - Alternating Current
Performance
WOT - Wide Open Throttle
ADS - Audi Drive Select
TRAP - Quarter Mile Speed Trap
ET - Quarter Mile Time
Dragy - Performance Meter
LC - Launch Control
ASR - Anti-Slip Regulation
TC - Traction Control
ESP - Electronic Stability Program
DA - Density Altitude
NLS - No Lift Shift
Steering
FBSW/FBW - Flat Bottom Steering Wheel
EHPS - Electrohydraulic Power Steering
EPS - Electric Power Steering
PS - Power Steering
TR - Tie Rod
TRE - Tie Rod End
ADS - Audi Dynamic Steering
DSR - Driver Steering Recommendation
Suspension
TCU - Transmission Control Unit
ADS - Adaptive Damping Suspension
CA - Control Arms
ACA - Adjustable Control Arms
EL - End Link
Wheel(s)
ET - WTR Offset (Einpresstiefe is German for Insertion Depth)
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