There are quite a lot of different car parts (Finnish: auton osat) in My Winter Car. These parts range from stock-like parts to aftermarket parts which can be installed to the Rivett. The car building system is also more optimized than My Summer Car, allowing a lot more spare parts to be added. The player can buy unlimited amounts of spare parts, except for an engine block, cylinder head, and the steering column. It comes down to your computer performance how many spare parts you can have.
Some engine parts can be bought brand new from Fleetari Repair Shop, some cosmetic parts from the parts magazine, and virtually all parts can be found on the classifieds magazine (though they vary in condition). Engine fluids and small replaceable parts (fan belt, oil filter, coolant, etc.) are acquired at PSK gas station.
| Part | Description | Bolts | Paintable | Damageable |
|---|---|---|---|---|
| Air cleaner | Keeps dirt out of the carburettor. | 1x7mm | No | No |
| Alternator | Powers the vehicle's electrical system and charges the battery while running. | 1x11mm, 1x screw | No | Yes |
| Aux shaft | Moves the auxiliary components such as the fuel pump and distributor. Part of the engine's distribution. | 3x6mm | No | Yes |
| Aux shaft sprocket | Connected to the Aux shaft. Part of the engine's distribution. | 1x14mm | Yes | No |
| Block | Holds the engine components together, such as the pistons, crankshaft, etc. | 2x12mm (Engine mount) | Yes | Yes |
| Camshaft | Rotates in the engine, controlling the opening and closing of the engine's valves. Different variants available at Fleetari's. | 2x6mm | No | Yes |
| Camshaft sprocket | The gear on the camshaft that turns with the engine to open and close valves. Part of the engine's distribution. | 1x14mm | Yes | No |
| Carburettor | Mixes air and fuel for the engine's combustion process. | 5x9mm | No | No |
| Clutch cover plate | Protects the clutch assembly in a vehicle. | 6x8mm | Yes | No |
| Clutch disc | Connects the engine to the transmission for gear changes. | None | No | Yes |
| Clutch pressure plate | Responsible for engaging and disengaging the engine's power from the transmission. | None | No | No |
| Crankshaft | Rotates in the engine, converting the "up and down" movement of pistons into rotational motion. | None | No | Yes |
| Crankshaft pulley | The wheel on the crankshaft that controls engine accessories (alternator, water pump) by the engine belt. | 1x13mm | Yes | No |
| Cylinder head | The top part of the engine that contains the combustion chambers and valves. | 10x9mm | No | No |
| Distributor | Makes sure that the spark plugs fire at the right time. | 1x screw | No | Yes |
| Exhaust manifold | Takes exhaust gases to the exhaust pipe. Also known as exhaust headers. | 8x9mm | No | No |
| Fan | Part of the cooling system of the engine. Bolted onto the water pump pulley. | 4x8mm | Yes | No |
| Fan belt | Used to transfer power to the alternator and water pump. Also known as an alternator belt. Acquired at PSK. | None | No | Yes |
| Flexplate | Used in automatic transmissions. | 6x12mm | No | No |
| Flywheel | Used in manual transmissions. | 6x12mm | No | No |
| Fuel pump | Pumps fuel from the fuel tank to the engine. | 2x7mm | No | Yes |
| Fuse box | Powers up a vehicle and makes the electrical car parts work. | None | No | No |
| Gearbox | The component that transmits power to the vehicle's drive wheels. | 6x11mm | No | Yes |
| Headgasket | Seals the engine block and cylinder head, preventing combustion gases, coolant and oil from leaking. Crucial for maintaining compression. | None | No | Yes |
| Main bearings | Used to hold the crankshaft in place. | 2x10mm | No | Yes |
| Oil filter | A filter where dirt particulates in the oil are removed and kept so dirt won't flow through the engine. Acquired at PSK. | None (Hand tighten) | No | Yes |
| Oilpan | Contains the engine's oil. | 10x7mm, 1x13mm | No | No |
| Oil pump | Circulates engine oil under pressure to the rotating bearings, sliding pistons and camshaft. | 2x6mm | No | Yes |
| Piston | The moving part of the combustion chamber; converts energy from combustion into mechanical work. | 2x8mm | No | Yes |
| Rear plate | Used as a gasket between the engine and transmission. Also holds the starter. | None | No | No |
| Rocker | Passes motion from the camshaft to the inlet / outlet valve. | 1x Clip | No | Yes |
| Rocker cover | Cover that encloses the rocker arm in an internal combustion engine. | 8x7mm | No | No |
| Starter | Rotates parts in an engine when first turned on, completing a combustion cycle, enabling it to run on its own power. | 1x6mm, 3x8mm | No | Yes |
| Spark plug | Provides the spark needed for combustion. | 1x Spark plug wrench/socket | No | Yes |
| Thermostat | Used to close engine block cooling to warm up faster; if damaged, the engine can overheat or take longer to warm up. | None | No | Yes |
| Thermostat housing | Encloses the thermostat and provides the coolant pathway between the engine and the radiator. | 2x8mm | No | No |
| Timing belt | Used to time the crankshaft, camshaft and aux shaft. | None | No | Yes |
| Timing belt cover | Covers the engine's distribution. | 2x6mm | Yes | No |
| Water pump | Pumps coolant through the cooling system. | 4x7mm | No | Yes |
| Water pump pulley | A pulley that operates the water pump. | 4x8mm (Shared with Fan) | Yes | No |
| Part | Description | Bolts | Paintable | Damageable |
|---|---|---|---|---|
| Battery | Supplies electrical energy to a vehicle. Can be bought at PSK gas station. | 2x8mm | No | Yes |
| Brake master cylinder | Converts pressure to lock up the brakes. | 4x8mm | No | Yes |
| Brake lines | Brake fluid flows through these pipes and circulates into the brakes. Two visually similar brake lines exist depending on normal or power brakes. | 6x7mm, 2x10mm | No | No |
| Clutch cable | Connects from the manual pedal box to control the clutch. | 1x7mm | No | Yes |
| Exhaust pipe front | Connected from the exhaust manifold. | 1x7mm, 2x8mm, 2x11mm | No | No |
| Exhaust pipe rear | Connected from the exhaust pipe front. | 1x9mm, 2x7mm | No | No |
| Fuel tank | Contains the gasoline used by the engine. | 2x10mm | No | No |
| Gearbox crossmember | Structurally supports the transmission. | 2x14mm | No | No |
| Heater box | Uses the heat from the engine to heat the inside of the vehicle. | 4x7mm | No | Yes |
| Heater hose | Used to transport hot coolant fluid in and out the heater box. | 2x screw | No | No |
| Ignition coil | Transforms the low voltage of the battery into the energy necessary for the spark plugs. | 2x8mm | No | Yes |
| Muffler | Reduces the noise made by the engine. | 1x8mm | No | No |
| Power brake cylinder | Locks up the brakes more easily than the stock, improving the braking of the car. | 4x8mm | No | Yes |
| Radiator | Used to cool the engine with coolant, with a fan. | 4x10mm | No | Yes |
| Radiator hose (top / bottom) | Connects the radiator to the engine. | 2x screw | No | No |
| Steering column | A shaft connecting to the suspension, letting the driver turn the vehicle with the steering wheel. Contains the controls for wipers, lights and the ignition port. | 2x12mm | No | No |
| Steering rack | Part of the steering mechanism, letting the vehicle turn left and right with the steering wheel. | 4x9mm, 2x11mm | No | Yes |
| Steering shaft | Connects the steering components. | 1x6mm | No | No |
| Wiper motor assembly | Used to operate the wiper blades. | 4x7mm | No | Yes |
| Part | Description | Bolts | Paintable | Damageable |
|---|---|---|---|---|
| Front brake assembly | Makes it possible to brake the front wheel. | 2x12mm | No | No |
| Coil spring | Helps smooth out the ride. Comes in different lengths and stiffness. One needed for each wheel. | None | No | Yes |
| Driveshaft | Transfers power from the gearbox to the rear axle. | 4x8mm | No | Yes |
| Front links | Part of the suspension, stabilizing the car's body in corners. Two needed. | 2x11mm, 1x12mm | No | No |
| Front lower control arm | Connects the front wheels to the car's body. Two needed. | 1x14mm | No | No |
| Front upper control arm | Allows for vertical movement of the front wheels and keeps them aligned. Two needed. | 2x14mm | No | No |
| Rear axle | Transfers the received power to the rear wheels. | 1x7mm, 4x15mm | No | Yes |
| Rear lower control arm | Connects the rear wheels to the car's body. Two needed. | 1x13mm | No | No |
| Rear upper control arm | Allows for vertical movement of the rear wheels and keeps them aligned. Two needed. | 1x15mm | No | No |
| Front shock absorber | A vapor gas-filled tube that dampens shock impulses, smoothing the ride. | 2x8mm, 1x12mm | No | Yes |
| Rear shock absorber | Dampens shock impulses at the rear. | 2x13mm | No | Yes |
| Wheels | Connect the vehicle to the ground and are needed for it to move. Different sizes might change performance. | 4x15mm | Yes (Wheel) | Yes (Tire) |
| Part | Description | Bolts | Paintable | Damageable |
|---|---|---|---|---|
| Bootlid | Covers the trunk (boot) area to prevent items from falling. | 4x8mm | Yes | Yes |
| Car doors | Used by the player to get in and out of the vehicle. | 4x8mm | Yes | Yes |
| Fender | Protects the front side of the vehicle, including the wheel and suspension components. | 6x8mm | Yes | Yes |
| Front bumper | Absorbs impact damage on the front of the vehicle. | 2x10mm | Yes | Yes |
| Grille | Decorative part covering the radiator and allowing airflow to the engine. | 2x9mm | Yes | Yes |
| Grille cover | Helps the radiator maintain its temperature. | None | No | No |
| Headlights | Used for seeing what is in front of a vehicle in dark places. | 2x9mm | No | No |
| Hood | Protects from things such as rain and provides access to the engine. | 4x7mm | Yes | Yes |
| Hubcap | Decorative part, also protects the wheel's wheel nuts. | None | No | No |
| Rear bumper | Absorbs impact damage on the rear of the vehicle. | 2x10mm | Yes | Yes |
| Rear light | Used for seeing what is behind a vehicle in dark places. | 2x8mm | No | No |
| Part | Description | Bolts | Paintable | Damageable |
|---|---|---|---|---|
| Car seats | Seats to sit in and drive the car. | 3x10mm, 1x8mm | No | No |
| Center console | Displays four different dials. | 2x6mm | No | No |
| Column shroud | Interior part covering the steering column. | 1x8mm | No | No |
| Dashboard | Panel that holds the user controls for the climate control, radio and instrument panel. Contains a glovebox. | 2x7mm | No | No |
| Dashboard bottom cover | Bottom part of the dashboard. | 2x screw | No | No |
| Dashboard top cover | Top part of the dashboard. | None | No | No |
| Fresh air duct | Drives fresh air from outside the vehicle into the cabin. | 1x8mm | No | No |
| Gear lever | Used to shift vehicles into gears. | None | No | No |
| Hand brake lever | Locks up the rear brakes. Useful for parking and drifting. | 1x6mm, 2x7mm | No | No |
| Heater controls | Part of the instrument panel used to adjust temperature, direction and speed of the air. | 2x6mm | No | No |
| Instrument panel | Part of the dashboard housing the instrument gauges. Different trims include different gauges (clock, tachometer in sportier trims). | 2x screw | No | No |
| Parcel shelf | Removable cover behind the rear seats, separating boot and cabin. Speakers can be mounted onto it. | None | No | No |
| Manual pedal box | Allows control of the throttle, brakes and clutch with the driver's feet. | 4x8mm | No | No |
| Automatic pedal box | Allows control of the throttle and brakes with the driver's right foot. | 4x8mm | No | No |
| Radio | Used for listening to music. | None | No | No |
| Rear seat backrest | For sitting in the vehicle. Comes in different colours. | 2x12mm | No | No |
| Rear seat bench | Rear seating for the vehicle. | 2x12mm | No | No |
| Steering wheel | Connected to the steering column, used to steer the vehicle. A GT variant came with sportier trims. | 1x14mm | No | No |
Performance and cosmetic upgrades for the Rivett:
| Part | Description | Bolts | Paintable | Damageable |
|---|---|---|---|---|
| AFR gauge | Shows the Rivett's current air to fuel ratio. | 1x screw | No | No |
| Airdam spoiler | Provides downforce on the front axle. | — | Yes | Yes |
| Amplifier & Subwoofers | Improve sound, bass and volume of the Rivett's radio. | 2x5mm | No | No |
| Antenna | Improves the radio's reception quality. | 1x8mm | No | No |
| Racing bucket seats | Lighter, safer than normal seats. | 4x10mm | No | No |
| Car CD player | More modern radio with CD functionality. | — | No | No |
| Collector | Allows mounting the Side Pipe to most exhaust headers. | 2x11mm, 1x8mm | No | No |
| Ducktail spoiler | Provides downforce on the rear axle. | — | Yes | Yes |
| Extinguisher clamp | Used to mount a fire extinguisher to the Rivett. | 2x8mm | No | No |
| Extra gauges | Provide additional information on the Rivett. | 2x screw | No | No |
| Fender flares | Decorative body part broadening the wheel arches of the Rivett. | None | Yes | Yes |
| Fiberglass hood | Lighter hood than the standard one. | Clips | Yes | Yes |
| Long headers | Allows mounting the Side Pipe. | 8x9mm | No | No |
| Front-rear pipe | Connects the long headers to any muffler. | 2x8mm, 1x9mm | No | No |
| Marker lights | Small lights at the front that provide visibility. | 2x8mm | No | No |
| Rally coil springs | Stiffer springs for rally use. | None | No | No |
| Racing harness | Four-point harness that is safer than a normal seat belt. | 4x10mm | No | No |
| Rally mudflaps | Reduce spray from the tires. Required for ice racing. | None | No | No |
| Rally front shock absorber | Improved shock absorbers made for rally. | 2x8mm, 1x12mm | No | Yes |
| Rally rear shock absorber | Improved rear shock absorber for rally. | 2x13mm | No | Yes |
| Rally steering wheel | A thicker steering wheel with an extra grippy surface and a middle position marker, designed for racing. | 1x14mm | No | No |
| Rear spoiler | A rear spoiler attached to the bootlid of the Rivett. | None | Yes | No |
| Side skirts | Decorative part of the Rivett. | 2x11mm | Yes | Yes |
| Skid plate | Increases protection of the underside of the engine. | 4x9mm | No | No |
| Rally lights | Further improve vision in low light conditions. | 2x10mm | No | No |
| Rev limiter | Limits the RPMS of the engine. | 1x screw | No | No |
| Roll cage | Stiffens the Rivett's body and protects it and passengers in collisions and roll-overs. | None | Yes | No |
| Safety fuel cell (19L) | Resistant to impacts. | 4x9mm | No | No |
| Side pipe | Sporty exhaust with a different sound, exiting the side of the Rivett's underbody. | 1x8mm | No | No |
| Budget tachometer | Shows the RPM of the engine. | 1x screw | No | No |
| Professional tachometer | Shows the RPM of the engine. | 1x screw | No | No |
| Window grille | Adds a nice touch to the rear window and protects it against sunlight. | None | No | No |
| Steering wheel cover | Covers for the steering wheel. | None | No | No |
| Interior cover | Covers for the seats and dashboard. | None | No | No |
These are confirmed types of items set to be introduced into the game, currently categorized as "section items" as they lack specific names:
Parts the developer wants to add during development or in later updates: