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For 2012-2017 Chrysler 300 models, the front suspension uses MacPherson struts and the rear uses a multi-link design. Common torque checks include front strut-to-knuckle pinch bolts, often around 85-95 lb-ft, upper strut rod nuts, usually 20-30 lb-ft, and sway-bar link nuts, around 45-55 lb-ft. Rear strut and control-arm fastener torque varies by trim and drivetrain, so always confirm values in a factory service manual. Suspension-related diagnostic trouble codes for ESC/traction control include C1201, C1202, C121A, and U0121; these can be triggered by misaligned steering angle sensors, faulty wheel-speed sensors, or loose suspension components. When replacing struts, inspect spring seats, bump stops, and bushings, and perform a wheel alignment afterward. For future Stellantis applications, standards such as SAE J2833 are moving toward more standardized diagnostics and compliance requirements, but 2012-2017 repairs still rely on published OEM torque specs and service procedures.