This manual covers the 1991 Porsche 911 Carrera 4, chassis code 964, equipped with the M64/01 engine. This model represents a significant evolution in the iconic 911 lineage, distinguished by its standard all-wheel-drive system, enhanced aerodynamics with an integrated rear spoiler, and the robust 3.6-liter air-cooled flat-six engine. The Carrera 4 was engineered to offer superior stability and traction, competing in the performance grand tourer segment of its era. Its blend of classic Porsche design and technological advancements makes it a highly regarded sports car, and this manual provides the essential technical documentation for maintaining its intrinsic value and performance.

This comprehensive workshop service repair manual in English offers complete factory service and repair information for the 1991 Porsche 911 Carrera 4. It details procedures for engine mechanicals, the Motronic engine management system, the G50 5-speed manual transmission, and the all-wheel-drive drivetrain. Coverage extends to brakes, suspension, steering, electrical systems, bodywork, and HVAC. The manual includes routine maintenance, troubleshooting guides, detailed engine and transmission rebuild procedures, and advanced diagnostic information, making it an invaluable resource for owners, mechanics, and technicians dedicated to the proper upkeep and repair of this classic Porsche.