Inspect vehicles for damage and record findings so that necessary repairs can be made. Test drive vehicles and test components and systems, using equipment such as infrared engine analyzers, compression gauges, and computerized diagnostic devices. Estimate costs of vehicle repair. Repair, reline, replace, and adjust brakes. Align wheels, axles, frames, torsion bars, and steering mechanisms of automobiles, using special alignment equipment and wheel-balancing machines. Tear down, repair, and rebuild faulty assemblies, such as power systems, steering systems, and linkages. Repair and service air conditioning, heating, engine cooling, and electrical systems. Troubleshoot fuel, ignition, and emissions control systems, using electronic testing equipment. Repair or rebuild transmissions. Disassemble units and inspect parts for wear, using micrometers, calipers, and gauges. Test electronic computer components in automobiles to ensure proper operation.