OEM parts categories for 1991 Audi V8 Quattro: A/C & Heating (A/C & Heater Control Units, A/C Compressor, A/C Condenser, Air Conditioner, Automatic Temperature Controls, Blower Motor & Fan, Heater Components) | Air & Fuel Delivery (Air Inlet, Cruise Control System, Fuel Injection, Fuel Supply, Fuel System Components, Intake Manifold, Intercooler, Turbocharger) | Belts & Cooling (Belts, Cooling System, Radiator, Water Pump, Cooling Fan, Oil Cooler, Radiator & Components, Radiator Support) | Body & Hardware (Back Glass, Center Console, Center Pillar & Rocker, Cowl, Door & Components, Fender & Components, Exterior Trim, Front Bumper, Front Door, Front Door - Glass & Hardware, Front Door - Lock & Hardware, Glass & Hardware - Quarter Panel, Heat & Sound Insulators, Hood & Components, Inner Components - Quarter Panel, Inner Structure & Rails - Fender, Instrument Panel, Latch & Hardware, Outer Components - Quarter Panel, Rear Body & Floor, Rear Bumper, Rear Door, Rear Door - Glass & Hardware, Rear Door - Lock & Hardware, Roof & Components, Sunroof, Tracks & Components, Trunk, Trunk Lid, Windshield Glass) | Brakes (Anti-Lock Brakes, Brake Components, Front Brakes, Hydraulic System, Parking Brake, Rear Brakes, Traction Control Components) | Charging & Starting (Alternator, Headlamps, Headlamp Washers/Wipers, Fog Lamps, Bulbs, Flashers, Ignition System, Ignition Lock, Distributor, Anti-Theft Components, Supplemental Restraint System, Antenna & Radio, Battery, Door, Heated Seats, Horn, Instruments & Gauges, Mirrors, Powertrain Control, Senders, Sunroof, Switches, Window Defroster, Wipers, Starter) | Driveline & Axles (Front Axle Shafts & Joints, Drive Axles, Rear Axle, Axle Shafts & Joints, Differential, Propeller Shaft) | Electrical (ABS Components, Air Bag Components, Alarm System, Cruise Control System, Electrical Components, Front Seat Belts, Headlamps, Headlamp Washers/Wipers, Fog Lamps, Bulbs, Flashers, Ignition System, Ignition Lock, Distributor, Anti-Theft Components, Supplemental Restraint System, Antenna & Radio, Battery, Door, Heated Seats, Horn, Instruments & Gauges, Mirrors, Powertrain Control, Senders, Sunroof, Switches, Window Defroster, Wipers, Knee Bar & Pads, Rear Seat Belts, Washer Components) | Emission Control & Exhaust (EGR System, Emission Components, Exhaust Components, Exhaust Manifold) | Engine (Engine Appearance Cover, Engine Mounting, Engine Parts, Mounts, Cylinder Head & Valves, Camshaft & Timing, Oil Cooler, Oil Pan, Oil Pump, Crankshaft & Bearings) | Headlights & Lighting (Backup & Tail Lamps, Front Lamps - Fog Lamps, Headlamps, Headlamps, Headlamp Washers/Wipers, Fog Lamps, Bulbs, Flashers, Ignition System, Ignition Lock, Distributor, Anti-Theft Components, Supplemental Restraint System, Antenna & Radio, Battery, Door, Heated Seats, Horn, Instruments & Gauges, Mirrors, Powertrain Control, Senders, Sunroof, Switches, Window Defroster, Wipers, High Mount Lamps, License Lamps, Park Lamps, Signal Lamps, Tail Lamps) | Interior & Exterior Trim (Exterior Trim - Front Door, Exterior Trim - Rear Door, Fender & Components, Exterior Trim, Interior Trim) | Maintenance & Lubrication (Automatic Transmission, Filters) | Steering (P/S Pump & Hoses, Steering Gear & Linkage, Steering Column & Wheel, Steering Gear & Linkage) | Suspension (Axle Shaft - Front, Drive Shaft - Rear, Front Suspension Components, Lower Control Arm, Stabilizer Bar, Rear Axle, Stabilizer Bar, Suspension Components, Rear Suspension Components, Lower Control Arm, Shocks & Components - Rear, Wheels) | Transmission (Automatic Transmission, Clutch & Flywheel, Hydraulic System, Manual Transmission)