OEM parts categories for 2020 Audi A4: A C Compressor (A C Compressor) | A C Condenser (A C Condenser) | A/C & Heating (A/C & Heater Control Units, A/C Condenser, Compressor & Lines, A/C Evaporator Components, Air Conditioner, Automatic Temperature Controls, Blower Motor & Fan, Heater Components, Heater Core & Control Valve, HVAC Case, Switches & Sensors) | Air & Fuel Delivery (Air Intake, Cruise Control, Fuel Injection, Fuel Supply, Fuel System Components, Intake Manifold, Intercooler, Throttle Body, Turbocharger) | Aperture Panel (Aperture Panel) | Belts & Cooling (Belts & Pulleys, Cooling System, Radiator, Water Pump, Cooling Fan, Hoses & Lines, Intercooler, Radiator & Components, Trans Oil Cooler, Water Pump) | Belts Pulleys Belts (Belts Pulleys Belts) | Blower Motor Fan (Blower Motor Fan) | Body & Hardware (Aperture Panel, Uniside, Bumper & Components - Front, Bumper & Components - Rear, Center Pillar & Rocker, Cluster & Switches, Instrument Panel, Console, Cowl, Dash Panel Components, Door & Components, Ducts, Electrical Components - Front Bumper, Electrical Components - Rear Bumper, Fender & Components, Floor & Rails, Front Door, Front Door Glass & Hardware, Front Seat Components, Glass & Hardware - Back Glass, Glass & Hardware - Quarter Panel, Glove Box, Grille & Components, Hinge Pillar, Hood & Components, Information Labels, Inner Structure - Quarter Panel, Jack & Components, Lock & Hardware, Outside Mirrors, Quarter Panel & Components, Radiator Support, Rear Body, Rear Door, Rear Floor & Rails, Rear Seat Components, Rear Spoiler, Roof & Components, Seat Belt, Sound System, Splash Shields, Structural Components & Rails, Sunroof, Trunk, Trunk Lid & Components, Under Cover & Splash Shields, Windshield Glass, Reveal Moldings, Wiper & Washer Components) | Brake Components (Brake Components) | Brakes (Anti-Lock Brakes, Brake Components, Front Brakes, Hydraulic System, Parking Brake, Rear Brakes) | Bulbs (Bulbs) | Camshaft Timing (Camshaft Timing) | Charging & Starting (Alternator, Battery, Starter) | Cluster Switches (Cluster Switches) | Cooling Fan (Cooling Fan) | Cruise Control System (Cruise Control System) | Driveline & Axles (Axle Shafts & Joints, Drive Axles) | Driver Seat Components (Driver Seat Components) | Electrical (ABS Components, Air Bag Components, Alarm System, Antenna & Radio, Anti-Theft Components, Communication System Components, Electrical 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, Senders, Starter, Sunroof, Switches, Trunk, Washer Components, Wipers, Wiring Harness) | Emission Control & Exhaust (Emission Components, Exhaust Components, Exhaust Manifold, Heat Shields) | Engine (Engine, Engine & Trans Mounting, Engine Appearance Cover, Engine Parts, Mounts, Cylinder Head & Valves, Camshaft & Timing, Oil Pan, Oil Pump, Balance Shafts, Crankshaft & Bearings, Pistons, Rings & Bearings, Transaxle Parts, Turbocharger & Components, Valve & Timing Covers) | Engine Mounting (Engine Mounting) | Front Axle (Front Axle) | Front Door (Front Door) | Fuel Door (Fuel Door) | Fuel System Components (Fuel System Components) | Glass Door (Glass Door) | Glass Windshield (Glass Windshield) | Headlights & Lighting (Backup Lamps, Headlamp Components, Headlamps, Headlamp Washers/Wipers, High Mount Lamps, License Lamps, Tail Lamps) | Heat Shields Emission (Heat Shields Emission) | Hood Components (Hood Components) | Hoses Lines Pipes (Hoses Lines Pipes) | Hydraulic System Brakes (Hydraulic System Brakes) | Instrument Panel (Instrument Panel) | Instrument Panel Components (Instrument Panel Components) | Intercooler Air (Intercooler Air) | Interior & Exterior Trim (Exterior Trim - Fender, Exterior Trim - Front Door, Exterior Trim - Pillars, Exterior Trim - Quarter Panel, 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 (Automatic Transmission, Belts & Pulleys, Filters) | Mirrors (Mirrors) | Passenger Seat Components (Passenger Seat Components) | Powertrain Control (Powertrain Control) | Rear Door (Rear Door) | Seat Belt Body (Seat Belt Body) | Starter (Starter) | Steering (Shroud, Switches & Levers, Steering Column & Wheel, Steering Gear & Linkage) | Sunroof (Sunroof) | Supplemental Restraint System (Supplemental Restraint System) | Suspension (Axle & Differential - Rear, Drive Axles - Front, Drive Axles - Rear, Drive Shaft - Rear, Front Suspension Components, Lower Control Arm, Stabilizer Bar, Rear Suspension Components, Lower Control Arm, Upper Control Arm, Stabilizer Bar, Shocks & Components - Rear, Stabilizer Bar & Components - Front, Struts & Components - Front, Suspension Mounting - Front, Suspension Mounting - Rear, Wheels) | Transmission (Automatic Transmission, Gear Shift Control - AT, Valve Body) | Trunk (Trunk) | Under Cover Splash Shields Body (Under Cover Splash Shields Body) | Wiper Washer Components (Wiper Washer Components)