OEM parts categories for 2019 Audi A3: A/C & Heating (A/C & Heater Control Units, A/C Condenser, Compressor & Lines, A/C Evaporator & Heater Components, Air Conditioner, Blower Motor & Fan, Heater Core & Control Valve, HVAC Case, Switches & Sensors) | Air & Fuel Delivery (Air Intake, Cruise Control System, Fuel Injection, Fuel Supply, Fuel System Components, Intake Manifold, Intercooler, Throttle Body, Turbocharger) | Belts & Cooling (Belts & Pulleys, Cooling System, Radiator, Water Pump, Cooling Fan, Hoses, Lines & Pipes, Intercooler, Radiator & Components, Water Pump) | Body & Hardware (Aperture Panel, Hinge Pillar, Uniside, Center Pillar & Rocker, Cluster & Switches, Instrument Panel, Console, Cowl, Dash Panel Components, Door - Glass & Hardware, Door - Lock & Hardware, Door & Components, Ducts, Fender & Components, Frame & Components - Convertible Top, Front Bumper, Front Door, Front Door - Glass & Hardware, Front Door - Lock & Hardware, Front Seat Components, Glass & Hardware - Back Glass, Glove Box, Grille & Components, Hood & Components, Information Labels, Inner Structure - Quarter Panel, Jack & Components, Lift Gate, Motor & Components, Outside Mirrors, Pillars, Rocker & Floor - Floor & Rails, Quarter Panel - Glass & Hardware, Quarter Panel & Components, Quarter Window, Radiator Support, Rear Body, Rear Body - Floor & Rails, Rear Bumper, Rear Door, Rear Door - Glass & Hardware, Rear Door - Lock & Hardware, Rear Seat Components, Rear Spoiler, Reveal Moldings, Rocker Panel, Roof & Components, Seat Belt, Sound System, Splash Shields, Stowage Compartment, Structural Components & Rails, Sunroof, Top Cover & Components, Tracks & Components, Trunk, Trunk Lid, Under Cover & Splash Shields, Windshield Glass, Reveal Moldings, Windshield Header & Components, Wiper & Washer Components) | Brakes (Anti-Lock Brakes, Brake Components, Front Brakes, Hydraulic System, Parking Brake, Rear Brakes) | Charging & Starting (Alternator, Battery, Hybrid Components, Battery, Cooling System, Starter) | Driveline & Axles (Front 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, Convertible Top, Cruise Control System, 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, Quarter Window, Rear Door, Rear Seat Belts, Roll Bar, Seat Belt, Senders, Starter, Sunroof, Switches, Tire Pressure Monitoring, Washer Components, Wiper & Washer Components, Wiring Harness) | Emission Control & Exhaust (A.I.R. System, Emission Components, Exhaust Components, Exhaust Manifold) | Engine (Engine & Trans Mounting, Engine Appearance Cover, Engine Parts, Mounts, Cylinder Head & Valves, Camshaft & Timing, Oil Cooler, Oil Pan, Oil Pump, Balance Shafts, Crankshaft & Bearings, Pistons, Rings & Bearings, Transaxle Parts, Turbocharger) | Headlights & Lighting (Backup Lamps, Bulbs, Headlamps, High Mount Lamps, License Lamps, Tail Lamps) | Interior & Exterior Trim (Exterior Trim - Door, Exterior Trim - Fender, Exterior Trim - Front Door, Exterior Trim - Pillars, Rocker & Floor, Exterior Trim - Quarter Panel, Exterior Trim - Rear Door, Exterior Trim - Trunk Lid, Interior Trim - Convertible Top, Interior Trim - Door, Interior Trim - Front Door, Interior Trim - Pillars, Rocker & Floor, Interior Trim - Quarter Panels, Interior Trim - Rear Body, Interior Trim - Rear Door, Interior Trim - Roof, Interior Trim - Trunk Lid) | Maintenance & Lubrication (Automatic Transmission, Belts & Pulleys, Filters) | Steering (Steering Column & Wheel, Steering Gear & Linkage, Shroud, Switches & Levers) | Suspension (Axle & Differential - Rear, Drive Axles - Front, Drive Axles - Rear, Drive Shaft - Rear, Front Suspension Components, Lower Control Arm, Stabilizer Bar, Rear Axle, Lower Control Arm, Stabilizer Bar, Suspension Components, Rear Suspension, Shocks & Components - Rear, Stabilizer Bar & Components - Rear, Struts & Components - Front, Suspension Mounting - Front, Suspension Mounting - Rear, Wheels, Covers & Trim) | Transmission (Automatic Transmission, Gear Shift Control - AT)