In Car Mechanic Simulator 2021, players can restore cars that are available in the game, whether if it is pre-installed, came from the downloadable content (DLC) car packs, or downloaded as a car mod from the Steam Workshop, using more than 4,000 car parts.
They can either sell it for additional profit and for future car projects, as well as added car parts and upgrades, or keep it as part of their in-game garage collection.
They can also repair or restore different kinds of cars, ranging from classic Americana muscle cars to compact cars to sports cars to full-size sedans to hatchbacks to grand tourers to minicars.
One of the cars that are already available in the game is the Mayen M3, or in the real life, it is the Audi S3, a third-generation subcompact executive car made by Audi for its Audi A3 line. The said car was manufactured from 2013 up until the present day.
How to Restore a Mayen M3
Players can find, and buy, the Mayen M3 at the Junkyard, the Barn, the Car Salon, and the Car Auction. Once they have purchased the said car, according to Boblas' YouTube video, they will wash the body and the interior in the Car Wash, then they will move it to one of the Car Lifts that are in the Garage.
From there, they will drain whatever oil that is left inside the engine using the Oil Drain machine, then they will drain the rest of the fluids such as the brake fluid, the coolant, the power steering fluid, and the windshield washer fluid using the Drain Tool.
Once they have drained everything, they will disassemble the whole car, and get the parts that can be repaired or replaced, until what is left on the Car Lift is the body frame, which they need to repair using the Wielding Machine. They will also need to recharge the battery, if it has one installed, by placing them on the Battery Charger.
Afterwards, they will repair the car parts that they can still use in the restoration project by placing them on the Repair Tables that are in the Workshop. From there, they will play a minigame where they will need to hit the green tabs in order to fully fix the said parts.
On the other hand, the car parts that cannot be repaired will be sold instead for additional Credit, which they can use to buy new replacement parts, or Performance Parts if they want to increase the car's Tuning percentage. If they bought the car from the Junkyard, they will also need to buy the parts that are missing.
Once they have the repaired and replaced parts, they can now start reassembling the whole Mayen M3, starting with the engine, which is an I4 DOHC 4x4.
In order to build the said engine on the Engine Stand, they will need the engine block, the crankshaft, the pistons with their rings, the oil pan, the oil filter, the flywheel, the clutch plate, the clutch pressure plate, and the clutch release bearing.
They will also need the engine head, the camshafts, the camshaft caps, the engine head cover, the spark plugs, the ignition coils, the exhaust manifold, the turbocharger, the intake manifold, the throttle, the fuel injectors, and the fuel filters.
They will also need the cam gears, the timing chains, the timing covers, the alternator, the power steering pump, the water pump, the idler rollers, the crankshaft pulley, the serpentine belts, and the belt tensioner.
Once they are done building the whole engine, they will remove it from the Engine Stand, then they install it in the engine bay using the Engine Pulley.
Then, they will install the car's internal parts such as the gearbox, the starter, the battery, the reservoirs, the ABS pump and module, the brake server, the ECU type A, the radiator with the fans, the intercooler the air filter with the base and cover, the fuse box and cover with the new fuses and relays, and the fuel tank and pump.
Then, they will install the rest of the parts, including those for the exhaust pipes, the suspension, and the braking system, as well as the tires with the rims, the body kit with the doors, the windshield and other glass panels for the windows, the side mirrors, the lights, and the parts for the interior such as the seats and the steering wheel.
Once they have finished reassembling the whole car, they will fill up the engine, the reservoirs, and the brake servo with a new batch of oil and other fluids, then they will paint the body with the color of their choice in the Paint Booth.
Afterwards, they will move it to the Test Path room to realign the tires and the lights, as well as to test the newly-installed braking system.
Then, they will move it to the Dyno Test room to tune up the gears in the gearbox and to do a dyno test to check the performance of the newly-built engine. Once they are satisfied with the results, they can now test drive their own Mayen M3.
