OEM parts categories for 2009 Audi A4 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, 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) | Belts & Cooling (Belts & Pulleys, Cooling System, Radiator, Water Pump, Cooling Fan, Hoses, Lines & Pipes, Intercooler, Oil Cooler, Radiator & Components, Trans Oil Cooler Lines, Water Pump) | Body & Hardware (Aperture Panel, Uniside, Back Glass, Center Pillar & Rocker, Cluster & Switches, Instrument Panel, Console, Console - Sound System, Cowl, Dash Panel Components, Door - Glass & Hardware, Door - Lock & Hardware, Door & Components, Ducts, Fender & Components, Exterior Trim, Frame & Components - Convertible Top, Front Bumper, Front Door, Front Door - Glass & Hardware, Front Door - Lock & Hardware, Front Seat Components, Gate & Hardware, Glove Box, Grille & Components, Hinge Pillar, Hood & Components, Information Labels, Inner Structure - Quarter Panel, Instrument Panel - Sound System, Jack & Components, Lift Gate - Glass & Hardware, Lift Gate - Spoiler, Lift Gate - Wiper & Washer Components, Motor & Components, Navigation System Components, Outside Mirrors, Pillars, Rocker & Floor - Floor & Rails, Pillars, Rocker & Floor - Under Cover & Splash Shields, Quarter Panel - Glass & Hardware, Quarter Panel & Components, Radiator Support, Rear Body, Rear Body - Floor & Rails, Rear Body & Floor - Under Cover & Splash Shields, Rear Bumper, Rear Door, Rear Door - Glass & Hardware, Rear Door - Lock & Hardware, Rear Seat Components, Roof & Components, Seat Belt, Splash Shields, Stowage Compartment, Structural Components & Rails, Sunroof, Top Cover & Components, Tracks & Components, Trunk, Trunk Lid, Trunk Lid - Spoiler, Uniside, Windshield - Wiper & Washer Components, Windshield Glass, Reveal Moldings, Windshield Header & Components) | Brakes (Anti-Lock Brakes, Brake Components, Front Brakes, Hydraulic System, Parking Brake, Rear Brakes, Traction Control Components) | Charging & Starting (Alternator, Battery, Starter) | Driveline & Axles (Front Axle Shafts & Joints, Drive Axles, Rear Axle, Axle Shafts & Joints, Differential, Drive Axles) | Electrical (ABS Components, Air Bag Components, Alarm System, Antenna & Radio, Anti-Theft Components, Communication System Components, Convertible Top, Cruise Control System, Door & 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, Mirrors, Navigation System, Parking Aid, Power Seats, Powertrain Control, Quarter Window, Rear Door, Rear Seat Belts, Ride Control, Senders, Starter, Sunroof, Switches, Tire Pressure Monitoring, Trunk, 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 Pan, Oil Pump, Crankshaft & Bearings, Pistons, Rings & Bearings, Variable Valve Timing, Transaxle Parts, Turbocharger, Valve & Timing Covers) | Headlights & Lighting (Backup Lamps, Bulbs, Chassis Electrical - Fog Lamps, Front Lamps - Fog Lamps, Headlamps, Headlamp Washers/Wipers, High Mount Lamps, License Lamps, Rear Lamps, Side Repeater Lamps, Tail Lamps) | Interior & Exterior Trim (Covers & Trim - Top, Exterior Trim - Door, Exterior Trim - Fender, Exterior Trim - Front Door, Exterior Trim - Lift Gate, Exterior Trim - Pillars, Rocker & Floor, Exterior Trim - Quarter Panel, Exterior Trim - Rear Door, Exterior Trim - Roof, Exterior Trim - Trunk Lid, Fender & Components, Exterior Trim, Interior Trim - Convertible Top, Interior Trim - Door, Interior Trim - Front Door, Interior Trim - Lift Gate, 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 (P/S Pump & Hoses, Steering Gear & Linkage, Shroud, Switches & Levers, 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, Upper 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, Covers & Trim) | Transmission (Automatic Transmission, Clutch & Flywheel, Gear Shift Control - AT, Gear Shift Control - MT, Hydraulic System, Transfer Case)