OEM parts categories for 1981 Mercury Zephyr 6 Cyl 3 3L 4Mt: Accelerator Linkage, Air Cleaner & Speed Control (Air Cleaner, Carburetor) | Air Conditioner, Radios & Shock Absorbers (Ac Hoses & Tubes, Air Conditioner Compressor Installation, Air Conditioner Condenser & Dehydrator, Air Conditioner Controls And Ducts, Air Conditioner Engine Compartment, Air Conditioner Evaporator, Air Conditioner Passenger Compartment, Heated Back Window (Defroster), Heater And Controls, Heater And Controls - Hose Installation, Heater Hoses & Tubes) | Alternator, Regulator, Battery, Starter & Distributor (Instrument Cluster Parts, Starter And Drive Assembly - Ford Positive Engagement) | Body Front & Floor (Instrument Panel, Windshield) | Body Sides & Quarter (Door Bumpers, Handles And Latch Parts - Front Door, Handles And Latch Parts - Front Door & Rear Door, Window Parts - Front Door) | Engine (Camshaft Gear And Bearings, Crankshaft And Flywheel, Engine Assy., Engine Supports) | Fenders & Hood (Hood) | Frame, Exhaust System, Spring & Stabilizer (Front Stabilizer, Front Suspension, Rear Suspension - Shock Absorbers And Springs) | Front Suspension & Steering (Front Suspension Arms, Shock Absorbers, Spindles, Springs And Stabilizer, Manual Steering System - Steering Gear Assembly, Manual Steering System - Steering Linkage, Steering Power Steering System, Steering Power Steering System - Pump Assy, Steering Power Steering System - Steering Column, Steering Power Steering System - Steering Linkage, Steering Power Steering System -Steering Gear Assy) | Fuel System & Manifolds (Emission System - Exhaust Gas - Recirculation (E.G.R.), Fuel Filler Door Fuel System, Fuel Filler Door In-Line Filter Installation, Fuel Filler Door Manifold - Exhaust, Fuel Filler Door Thermactor Emission) | IT Interior Trim Parts (Floor Insulators, Interior Trim Panels, Interior Trim Panels - (R.H. Quarter Panel) (L.H. Quarter Panel)) | Lamps & Wiring (Electrical Systems - Fuse Panel, Electrical Systems - Wiring System, Electrical Systems - Wiring System - Instrument Panel, Lamps Cargo, Lamps Dome Lamp, Lamps Dome/Map Lamp - Headliner Mounted, Lamps Dome/Map Lamp - Windshield Header Mounted, Lamps Headlamp, Parking And Front Fender Side Marker, Lamps Lamps Headlamp, Parking And Front Fender Side Marker W/Single Lamp, Lamps Rear Lamp, Backup, License Plate And Body Side Marker, Lamps Rear Lamp, Backup, License Plate And Body Side Marker - Rear Luggage Comparment And License Lamps) | Manual Transmission (External Parts Clutch And Clutch Pedal, External Parts Gearshift Mechanism Steering Column, Internal Parts) | Radiator & Grill (Cooling System) | Rear Axle & Drive Shaft (Driveline Vibration Damper - Rear Axle Mounted, Driveshaft, Rear Axle - Ring Gear) | Roof, Back, Luggage Compartment & Tailgate (Fuel Filler Door, Latch Parts - Luggage Compartment) | Seats (Child Safety Seat, Continuous Loop - Extension, Front Seat Parts - Bucket, Rear Seat Parts - Folding, Seat Belt And Shoulder Harness Installation - Continuous Loop) | SM Body Sheet metal (Upper Body) | Speedometer, Bumpers, Mirrors & Wipers (Rear Window - Washer And Wiper, Speedometer Cable, Windshield - Wiper And Washer) | Wheels & Brakes (Brake And Clutch Pedals, Disc Brake System, Disc Brake System - Brake Assy. - Disc Front, Disc Brake System - Brake Assy. - Drum Rear, Disc Brake System Brake Assy. - Drum Rear Brake Cylinder Assy. - Rear, Wheels Hub Cap And Wheel Cover)