OEM parts categories for 2021 Nissan Altima: 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) | Air & Fuel Delivery (Air Intake, Cruise Control, Fuel Injection, Fuel Supply, Fuel System Components, Intake Manifold, Throttle Body, Turbocharger) | Belts & Cooling (Belts & Pulleys, Cooling System, Radiator, Water Pump, Cooling Fan, Intercooler, Oil Cooler, Radiator & Components, Water Pump) | Body & Hardware (Aperture Panel, Bumper & Components - Front, Bumper & Components - Rear, Center Console, Center Pillar & Rocker, Cluster & Switches, Instrument Panel, Cowl, Dash Panel Components, Door & Components, Driver Seat Components, Ducts, Electrical Components - Rear Bumper, Fender & Components, Exterior Trim, Floor & Rails, Front Door, Front Door Glass & Hardware, Fuel Door, Glass & Hardware - Back Glass, Glass, Reveal Moldings, Glove Box, Grille & Components, Hinge Pillar, Hood & Components, Information Labels, Inner Structure - Quarter Panel, Jack & Components, Interior Trim, Lock & Hardware, Navigation System Components, Outside Mirrors, Passenger Seat Components, Quarter Panel & Components, Exterior Trim, Radiator Support, Splash Shields, Rear Body, Rear Door, Rear Floor & Rails, Rear Seat Components, Roof & Components, Exterior Trim, Seat Belt, Sound System, Spoiler, Exterior Trim, Structural Components & Rails, Sunroof, Trunk, Trunk Lid & Components, Wiper & Washer Components) | Brakes (Anti-Lock Brakes, Brake Components, Front Brakes, Hydraulic System, Parking Brake, Rear Brakes, Vacuum Booster) | Charging & Starting (Alternator, Battery, Starter) | Driveline & Axles (Axle Shafts & Joints, Drive Axles, Rear Axle, Axle Shafts & Joints, Differential, Drive Axles, Propeller Shaft) | Electrical (ABS Components, Air Bag Components, Antenna & Radio, Controls - Instruments & Gauges, Electrical Components, Front Door, Front Seat Belts, Fuse & Relay, Horn, Ignition Lock, Ignition System, Instruments & Gauges, Keyless Entry Components, Lane Departure Warning, Mirrors, Navigation System, Parking Aid, Power Seats, Powertrain Control, Rear Door, Rear Seat Belts, Senders, Starter, Sunroof, Switches, Tire Pressure Monitoring, Trunk, Wipers, Wiring Harness) | Emission Control & Exhaust (EGR System, Emission Components, Exhaust Components, Exhaust Manifold) | Engine (Engine & Trans Mounting, Engine Appearance Cover, Engine Parts, Mounts, Cylinder Head & Valves, Camshaft & Timing, Variable Valve Timing, Oil Cooler, Oil Pan, Oil Pump, Balance Shafts, Crankshaft & Bearings, Pistons, Rings & Bearings, Transaxle Parts, Turbocharger & Components) | Headlights & Lighting (Backup Lamps, Bulbs, Combination Lamps, Fog Lamps, Headlamp Components, Headlamps, High Mount Lamps, License Lamps, Signal Lamps) | Interior & Exterior Trim (Exterior Trim - Front Door, Exterior Trim - Rear Door, Fender & Components, Exterior Trim, Interior Trim - Front Door, Interior Trim - Pillars, Interior Trim - Quarter Panels, Interior Trim - Rear Door, Interior Trim - Roof, Interior Trim - Trunk, Jack & Components, Interior Trim, Quarter Panel & Components, Exterior Trim, Spoiler, Exterior Trim) | Maintenance & Lubrication (Automatic Transmission, Belts & Pulleys, Filters) | Steering (Shroud, Switches & Levers, Steering Column & Wheel, Steering Gear & Linkage) | Suspension (Axle & Differential - Rear, Drive Axles - Front, Front Suspension, Lower Control Arm, Stabilizer Bar, Suspension Components, Rear Suspension Components, Lower Control Arm, Upper Control Arm, Stabilizer Bar, Shocks & Components - Rear, Struts & Components - Front, Suspension Components, Stabilizer Bar & Components, Wheels, Covers & Trim) | Transmission (Automatic Transmission, Case & Related Parts, Gear Shift Control - AT, Oil Cooler, Transfer Case)