The for Car Mechanic Simulator 2021 (CMS 2021) is a substantial expansion that shifts the series' focus from purely stationary repair to performance tuning and competitive testing. It introduces dedicated racing mechanics and deep engine calibration tools, though some users find the core racing loop repetitive over time. Key Features & Additions
: Mandatory manual transmission for drag races and the ability to toggle Electronic Stability Control (ECS) and Traction Control (TCS) for more realistic handling. CAR MECHANIC SIMULATOR 2021 DRAG RACING(2021)
: Introduces ECU Tuning (with three stages) and Carburetor Tuning , allowing you to push engine performance to its limits through mini-games that affect horsepower and torque. The for Car Mechanic Simulator 2021 (CMS 2021)
: A dedicated strip featuring four distances: 1/8, 1/4, 1/2, and 1 mile. : Introduces ECU Tuning (with three stages) and
The DLC introduces a system, which categorizes cars into tiers based on their power and setup. Progression requires precise tuning—such as adjusting gear ratios or adding performance parts like slicks—to move a vehicle from lower classes (e.g., D-class) to elite competition.