OEM parts categories for 2011 Buick Regal: Body Moldings, Sheet Metal, Rear Compartment Hardware, Roof Hardware (Insulators/Body, Moldings/Body-Above Belt, Moldings/Body-Below Belt, Plugs/Body, Rear Compartment Hardware, Sheet Metal/Body Side Frame & Doors, Sheet Metal/Body-Engine Compartment & Dash, Sheet Metal/Body-Roof, Sheet Metal/Body-Side Frame, Sheet Metal/Body-Underbody & Rear End, Sunroof, Sunroof Drainage, Wheelhouse Liner/Rear) | Body Mounting, Air Conditioning, Audio/Entertainment (A/C & Heater Module Assembly, A/C Compressor Assembly, A/C Compressor Mounting, A/C Refrigeration System, Air Distribution System, Antenna/Audio, Antenna/Digital Audio, Audio System/Speakers, Audio System/Speakers & Amplifier, Cable Kit-Communication, Cable Kit-Digital Radio & Mobile Telephone & Vehicle Locator, Cable Kit-Digital Radio & Vehicle Locator, Communication System "Onstar", Radio Mounting, Radio Mounting & Display, Sensor/Temperature) | Body Wiring, Roof Trim (Wiring Harness/Body) | Brakes (Brake Booster, Brake Booster & Master Cylinder Mounting, Brake Caliper/Front, Brake Caliper/Rear, Brake Electrical System/Antilock, Brake Lines/Front, Brake Lines/Rear, Brake Master Cylinder, Brake Pedal, Brake Pressure Modulator Valve, Parking Brake System) | Brakes, Rear Axle, Propeller Shaft, Wheels, Tires (Tire, Tire Pressure Sensor, Wheels & Wheel Covers) | Cooling System, Grille, Oil System (Engine Block Heater, Engine Coolant Fan, Grille/Radiator, Hoses & Pipes/Radiator, Pulleys & Belts/Accessory Drive, Radiator Assembly, Radiator Mounting & Related Parts) | Engine (Clutch, Clutch Pedal & Cylinders, Engine & Transmission Mounting, Engine Assembly & Partial Engine, Engine Assembly-Cylinder Block & Internal Parts, Engine Assembly-Cylinder Head & Related Parts, Engine Assembly-Front Cover & Cooling, Engine Assembly-Manifolds, Turbocharger & Fuel Related Parts, Engine Assembly-Oil Pump, Pan & Related Parts, Engine To Transmission Mounting, Intake Manifold Shield/Covers) | Frames, Springs, Shocks, Bumpers, Fascias (Absorber/Rear Shock, Bumper/Front, Bumper/Rear, Frame & Mounting, License Plate Mounting/Front, Suspension/Rear) | Front End Sheet Metal, Heater (Fender & Wheelhouse/Front End, Hood, Hoses & Pipes/Heater, Insulators/Engine Compartment, Labels, Paint/Touch-Up, Spare Wheel Stowage & Jack Parts) | Front Suspension, Steering (Drive Axle/Front Intermediate, Drive Shaft/Front Wheel, Steering Column, Steering Column/Switches & Covers, Steering Control System-Module, Steering Gear Assembly, Steering Pump Lines, Steering Pump Mounting, Steering System & Related Parts, Steering Wheel & Horn Parts, Strut Assembly/Front, Suspension/Electrical, Suspension/Front) | Fuel System, Exhaust, Emission System (A.I.R. Pump & Related Parts, Accelerator Control, Air Intake System, E.C.M. Module & Related Parts, Exhaust System/Front, Exhaust System/Rear, Fuel Control Module, Fuel Injector Rail, Fuel Supply System, Fuel Tank & Vapor Canister, Fuel Tank And Mounting, Fuel Tank Filler Pipes & Hoses, Heat Shields/Exhaust, Turbocharger And Mounting, Turbocharger Assembly, Turbocharger Cooling System, Turbocharger Intercooler System, Turbocharger Lubrication System) | Interior Trim, Front Seat Trim, Seat Belts (Front Seat Mounting, Inflatable Restraint System/Driver & Passenger, Inflatable Restraint System/Roof Side, Roof Headliner, Seat Assembly/Driver-Back, Seat Assembly/Driver-Cushion, Seat Assembly/Passenger-Back, Seat Assembly/Passenger-Cushion, Seat Belt Extension, Seat Belts-Rear, Seat Belts/Front, Trim/Center Pillar & Quarter, Trim/Front, Trim/Front Door-Driver, Trim/Front Door-Passenger, Trim/Rear Door) | Rear Glass, Seat Parts, Adjuster (Rear Window) | Rear Seat Trim, Carpet (Carpet/Floor, Compartment Trim/Rear, Seat Assembly/Rear And Mounting, Seat Assembly/Rear-Back Detail, Trim/Back Window Shelf) | Starter, Generator, Ignition, Electrical, Lamps (Battery Cables, Battery Mounting, Block/Instrument Panel Junction, Generator Mounting, Horn, Lamps/Front, Lamps/Rear, Module/Body Control, Relays/Engine Compartment, Sensor System/Rear Object, Starter Motor And Mounting, Wiring Harness/Engine, Wiring Harness/Front Lamps, Wiring Harness/Instrument Panel) | Transmission - Automatic (Automatic Transmission 2-6 Low & Reverse & 1-2-3-4 Clutch Plate, Automatic Transmission 3-5 Reverse Clutch, Automatic Transmission 4-5-6 Clutch, Automatic Transmission Assembly, Automatic Transmission Case & Related Parts, Automatic Transmission Control Valve Body, Automatic Transmission Drive Link, Automatic Transmission Front Differential Carrier, Automatic Transmission Input, Output & Reaction Gearsets, Automatic Transmission Oil Cooler Pipes, Automatic Transmission Oil Pump, Automatic Transmission Park System, Automatic Transmission Torque Converter & Fluid Pump Housing, Shift Control, Transmission Vent Hose) | Transmission - Manual (Manual Transaxle Case Components, Manual Transaxle Differential Components, Manual Transaxle Input Shaft Components, Manual Transaxle Main Lower Shaft Components, Manual Transaxle Main Upper Shaft Components, Shift Control) | Windshield, Wiper, Mirrors, Instrument Panel, Console, Doors (Door Hardware/Front, Door Hardware/Rear, Entry System/Keyless Remote, Floor Console, Floor Console/Ashtray, Instrument Panel Trim, Instrument Panel/Electrical, Instrument Panel/Structure, Lock Cylinder Set, Mirror/Outside Rear View, Roof Console, Windshield Trim & Hardware, Wiper System/Windshield)