OEM parts categories for 2021 Audi A8 Quattro: A/C & Heating (A/C & Heater Control Units, A/C Condenser, Compressor & Lines, A/C Evaporator & Heater Components, Air Conditioner, Automatic Temperature Controls, Blower Motor & Fan, Electrical Components, Heater Components, Heater Core & Control Valve, Rear A/C Lines, Switches & Sensors) | Air & Fuel Delivery (Air Intake, Cruise Control, Fuel Injection, Fuel Supply, Fuel System Components, Intake Manifold, Intercooler, Throttle Body, Turbocharger) | Belts & Cooling (Belts & Pulleys, Coolant Reservoir, Cooling System, Radiator, Water Pump, Cooling Fan, Engine Oil Cooler, Hoses & Lines, Intercooler, Oil Cooler, Radiator & Components, Trans Oil Cooler, Water Pump) | Body & Hardware (Aperture Panel, Uniside, Bumper & Components - Front, Bumper & Components - Rear, Center Pillar, Cluster & Switches, Covers & Shields, Cowl, Dash Panel Components, Door & Components, Ducts, Electrical Components - Front Bumper, Electrical Components - Trunk Lid, Fender & Components, Floor & Rails, Front Console, Rear Console, Front Door, Front Door Glass & Hardware, Front Seat Components, Glass & Hardware - Back Glass, Glass & Hardware - Quarter Panel, Glass, Reveal Moldings, Glove Box, Grille & Components, Hinge Pillar, Hood & Components, Information Labels, Inner Structure - Quarter Panel, Instrument Panel, Jack & Components, Lock & Hardware, Outside Mirrors, Quarter Panel & Components, Radiator Support, Rear Body, Rear Door, Rear Floor & Rails, Rear Seat Components, Rocker Panel, Roof & Components, Seat Belt, Sound System, Splash Shields, Structural Components & Rails, Sunroof, Tracks & Components, Trunk, Trunk Lid & Components, Wiper & Washer Components) | Brakes (Anti-Lock Brakes, Brake Components, Front Brakes, Hydraulic System, Parking Brake, Rear Brakes) | Charging & Starting (Alternator, Battery, Cooling System, Hybrid Components, Battery, Cooling System, Starter) | Driveline & Axles (Axle Shafts & Joints, Drive Axles, Rear Axle, Axle Shafts & Joints, Differential, Drive Axles, Propeller Shaft) | Electrical (ABS Components, Air Bag Components, Alarm System, Antenna & Radio, Anti-Theft Components, Electrical Components, Entertainment System Components, Front Door, Front Seat Belts, Fuel Door, Fuse & Relay, Heated Seats, Horn, Ignition Lock, Ignition System, Instruments & Gauges, Keyless Entry Components, Lane Departure Warning, Lumbar Control Seats, Mirrors, Navigation System, Parking Aid, Power Seats, Powertrain Control, Rear Door, Rear Seat Belts, Ride Control, Senders, Starter, Sunroof, Switches, Trunk, Washer Components, Wipers, Wiring Harness) | Emission Control & Exhaust (Emission Components, Exhaust Components, Exhaust Manifold, Heat Shields) | Engine (Engine & Trans Mounting, Engine Appearance Cover, Engine Parts, Mounts, Cylinder Head & Valves, Camshaft & Timing, Variable Valve Timing, Oil Cooler, Oil Pan, Oil Pump, Balance Shafts, Crankshaft & Bearings, Pistons, Rings & Bearings, Transaxle Parts, Turbocharger & Components) | Headlights & Lighting (Headlamp Components, Headlamps, Headlamp Washers/Wipers, High Mount Lamps, Tail Lamps) | Interior & Exterior Trim (Exterior Trim - Fender, Exterior Trim - Front Door, Exterior Trim - Pillars, Exterior Trim - Rear Door, Exterior Trim - Trunk, Interior Trim - Front Door, Interior Trim - Pillars, Interior Trim - Quarter Panels, Interior Trim - Rear Body, Interior Trim - Rear Door, Interior Trim - Roof, Interior Trim - Trunk) | Maintenance & Lubrication (Belts & Pulleys, Filters) | Steering (Shroud, Switches & Levers, Steering Column & Wheel, Steering Gear & Linkage) | Suspension (Axle & Differential - Rear, Drive Axles - Front, Drive Axles - Rear, Drive Shaft - Rear, Front Suspension Components, Lower Control Arm, Upper Control Arm, Ride Control, Stabilizer Bar, Rear Suspension, Lower Control Arm, Upper Control Arm, Ride Control, Stabilizer Bar, Suspension Components, Shocks & Components - Front, Shocks & Components - Rear, Stabilizer Bar & Components - Front, Steering Gear, Suspension Mounting - Front, Suspension Mounting - Rear, Wheels, Covers & Trim) | Transmission (Automatic Transmission, Case & Related Parts, Gear Shift Control - AT, Oil Cooler, Valve Body)