OEM parts categories for 2018 Buick Regal: Body Moldings, Sheet Metal, Rear Compartment Hardware, Roof Hardware (Insulators/Body, Liftgate Hardware, Luggage Carrier, Moldings/Body-Lower, Moldings/Body-Upper, Nameplates, Plugs/Body, Sheet Metal/Body Side-Service Panels LH Side, Sheet Metal/Body Side-Service Panels RH Side, Sheet Metal/Body-Side Frame, Sheet Metal/Front Compartment, Sheet Metal/Roof, Sheet Metal/Side Door-Front & Rear, Sheet Metal/Underbody & Rear End, Spoiler/Rear Compartment Lid, Sunroof, Sunroof Drainage, Valve/Body Pressure Relief, Wheelhouse Liner/Rear, Wiper System/Rear Window) | Body Mounting, Air Conditioning, Audio/Entertainment (A/C & Heater Module Assembly, A/C & Heater Module Assembly Mounting, A/C Compressor Assembly, A/C Compressor Mounting, A/C Refrigeration System, Air Distribution System, Antenna/Audio, Antenna/Digital Audio, Audio System, Camera System/Rear View, Communication System "Onstar", Infotainment System, Navigation System/Data Card, Radio Mounting, Sensor/Temperature Ambient) | Body Wiring, Roof Trim (Wiring Harness/Body) | Brakes (Brake Booster, Brake Booster & Master Cylinder Mounting, Brake Caliper/Front, Brake Caliper/Rear, Brake Electrical System, 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 (Axle Shaft/Rear, Propeller Shaft & Mounting, Rear Differential Carrier, Rear Differential Carrier Mounting, Tire, Tire Inflator, Tire Pressure Sensor, Wheels) | Cooling System, Grille, Oil System (Air Deflector/Underbody, Engine Block Heater, Engine Coolant Fan, Engine Oil Cooler And Lines, Grille/Radiator, Hoses & Pipes/Radiator, Pulleys & Belts/Accessory Drive, Radiator Assembly, Radiator Mounting & Related Parts, Radiator Support) | Engine (Engine & Transmission Mounting, Engine Assembly & Partial Engine, Engine Assembly-Camshaft Cover & Coil, Engine Assembly-Cylinder Block & Internal Parts, Engine Assembly-Cylinder Head & Related Parts, Engine Assembly-Front Cover & Cooling, Engine Assembly-Manifolds & Fuel Related Parts, Engine Assembly-Oil Pump & Balance Shaft Detail, Oil Pan & Related Parts, Engine Assembly-Timing Chain & Tensioner, Engine To Transmission Mounting, Intake Manifold Shield/Covers) | Frames, Springs, Shocks, Bumpers, Fascias (Absorber/Rear Shock, Bumper/Front, Bumper/Front Fascia, Bumper/Front Structure, Bumper/Rear, Frame & Mounting, License Plate Mounting/Front, License Plate Mounting/Rear, Skid Plates, Suspension Controls/Electronic, Suspension/Rear-Control Arms, Spring & Stabilizer Bar, Suspension/Rear-Knuckle Details, Suspension/Rear-Support And Mounting) | Front End Sheet Metal, Heater (Accessory Kit, Fender & Wheelhouse/Front End, Fluid And Lubricant Recommendations, Guard/Front Mud, Guard/Rear Mud, Hood, Hoses & Pipes/Heater, Labels, Paint/Touch-Up, Spare Wheel Stowage & Jack Parts, Vehicle Maintenance) | Front Suspension, Steering (Drive Axle/Front Intermediate, Drive Shaft/Front Wheel LH Side, Drive Shaft/Front Wheel RH Side, Steering Column/Switches & Covers, Steering Gear Assembly, Steering System & Related Parts, Steering Wheel & Horn Parts, Strut Assembly/Front, Suspension/Front) | Fuel System, Exhaust, Emission System (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 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/Left Hand Front-Back, Seat Assembly/Left Hand Front-Cushion, Seat Assembly/Right Hand Front-Back, Seat Assembly/Right Hand Front-Cushion, Seat Belt Extension, Seat Belts-Rear, Seat Belts/Front, Trim/Center Pillar, Trim/Front, Trim/Front Door-Driver, Trim/Front Door-Passenger, Trim/Liftgate, Trim/Rear Door) | Power Transfer Unit (Power Transfer Unit, Power Transfer Unit Mounting) | Rear Glass, Seat Parts, Adjuster (Quarter Window) | Rear Seat Trim, Carpet (Cargo Net, Carpet/Floor, Compartment Trim/Rear, Compartment/Rear Storage Partition Package-Soft Shell, Cover/Rear Compartment, Floor Covering, Rear Seat Mounting, Seat ASM/Rear Center Back Detail, Seat ASM/Rear Left Hand Back Detail, Seat ASM/Rear Right Hand Back Detail, Seat Assembly/Rear-Back Detail, Trim/Quarter-Left Hand, Trim/Quarter-Right Hand) | Starter, Generator, Ignition, Electrical, Lamps (Alarm System/Anti Theft, Battery Cables, Battery Mounting, Block/Instrument Panel Junction, Generator Mounting, Headlamp Control, Horn, Lamps/Front, Lamps/Rear, Module/Body Control, Module/Multifunction Power Converter, Module/Noise Cancellation, Module/Serial Data Gateway, Pedestrian Protection System, Reflector/Disabled Vehicle, Relays/Engine Compartment, Sensor System/Forward Collision, Sensor System/Forward Collision-Camera, Sensor System/Forward Collision-Control Module, Sensor System/Forward Collision-Forward Range Radar, Sensor System/Front & Rear Object, Sensor System/Rear Object, Sensor System/Side Collision, Starter Motor And Mounting, Wiring Harness Connectors, Wiring Harness Terminated Leads, Wiring Harness/Chassis Rear, Wiring Harness/Engine, Wiring Harness/Instrument Panel, Wiring Harness/Lift Gate) | Transmission - Automatic (Automatic Transmission 1-Reverse And 1-2-3-4-5-6 Clutch Piston Housing Assembly, Automatic Transmission 2-9 And 3-8 Clutch Plate Assemblies, Automatic Transmission 2-9 And 4Th Clutch Hub Assembly, Automatic Transmission 2-9 And 4Th Clutch Piston Housing Assembly, Automatic Transmission 5-7-Reverse And 6-7-8-9 Clutch Housing Assembly, Automatic Transmission Assembly, Automatic Transmission Case & Related Parts, Automatic Transmission Case, Drive Link, 4th Clutch & Accum, Automatic Transmission Clutch Housing Assembly, Automatic Transmission Clutch Piston Housing Assembly, Automatic Transmission Clutch Plate Assemblies, Automatic Transmission Control Valve Body, Automatic Transmission Control Valve Solenoid Body Assembly, Automatic Transmission Differential Carrier, Automatic Transmission Internal Components, Automatic Transmission Oil Cooler Pipes, Automatic Transmission Oil Pump, Automatic Transmission Output Carrier Transfer Drive Gear Hub Assembly, Automatic Transmission Park System, Automatic Transmission Torque Converter And Differential Housing Assembly, Automatic Transmission-2 5-7-Reverse And 6-7-8-9 Clutch Housing Assembly, Shift Control, T.C.M. Module) | Windshield, Wiper, Mirrors, Instrument Panel, Console, Doors (Door Hardware/Front, Door Hardware/Front-Driver Side Handle, Door Hardware/Front-Passenger Side Handle, Door Hardware/Rear, Door Hardware/Rear-Handle, Entry System/Keyless Remote, Floor Console Mounting, Floor Console Upper, Floor Console-Lower, Floor Console/Ashtray, Instrument Panel Lower LH, Instrument Panel Lower RH, Instrument Panel-Upper, Instrument Panel/Center Stack, Instrument Panel/Structure, Mirror/Inside Rear View, Mirror/Outside Rear View, Roof Console, Windshield Trim & Hardware, Wiper System/Windshield)