The BMW 525i (E34) represents a significant chapter in the brand's history, produced between 1990 and 1996. This executive sedan and touring model is celebrated for its sophisticated engineering, embodying BMW's core philosophy of blending driving pleasure with everyday practicality. Key features include a balanced chassis, responsive inline-six engines (M20, M50, and M50TU with VANOS), a driver-focused interior, and high-quality materials, all contributing to its reputation for reliability and performance. The 525i was a direct competitor in the luxury mid-size segment, offering a premium driving experience that set it apart.
This comprehensive manual serves as an essential resource for owners and technicians alike, providing in-depth coverage of the BMW 525i (E34) models from 1990 to 1996. It details a wide array of systems, including engine (M20, M50/M50TU), transmission, drivetrain, suspension, steering, brakes, electrical systems, bodywork, and HVAC. The manual includes essential maintenance procedures, detailed troubleshooting guides, repair instructions, overhaul procedures, and technical specifications, ensuring proper upkeep and repair. Its extensive scope aims to empower users with the knowledge needed to maintain the vehicle's optimal performance and longevity.
BMW 525i FACTORY SERVICE REPAIR MANUAL FSM 1990 1991 1992 1993 1994 1995 1996 ONLINE DOWNLOAD
BMW 525i - 2.5 L M50B25 I6 192 PS (141 kW; 189 hp)
The 525i was built throughout the E34 production, and in 1992 was offered as a wagon (touring version) in the USA. In June 1990 (1991MY), the engine was switched from the single overhead cam M20 engine to the double overhead cam M50B25 engine, raising power from 170 to 192 horsepower (141 kW). Also, fuel economy by ten percent, and a change from a timing belt to a timing chain improved reliability. A further revision of the 525i engine took place in 1993, when VANOS was added to the M50 engine which was designated the M50TU. The TU represents a Technical Update, reflecting the variable valve timing technology (VANOS) added to the intake camshaft. VANOS brought no horsepower increase, but flattened the torque curve from about 3,000 rpm up to redline at approximately 6,300 rpm. M50 engine was the most popular variant sold in NA. Since models equipped with M50 engine lack power found in M30, M60b40 or S38 engines, many performance upgrades are available. For instance, for mere few hundred dollars, owners can install an aftermarket ECU chip to improve performance and even gain some fuel economy. Owners looking for a real upgrade in power have gone towards forced induction or an engine swap. Most popular engine swap is S50, and S52 found in E36 M3 and other M cars. They require very little modification to fit in 525i models.
BMW 525i FACTORY SERVICE REPAIR MANUAL FSM 1990 1991 1992 1993 1994 1995 1996 ONLINE DOWNLOAD
BMW 525i - 2.5 L M50B25 I6 192 PS (141 kW; 189 hp)
The 525i was built throughout the E34 production, and in 1992 was offered as a wagon (touring version) in the USA. In June 1990 (1991MY), the engine was switched from the single overhead cam M20 engine to the double overhead cam M50B25 engine, raising power from 170 to 192 horsepower (141 kW). Also, fuel economy by ten percent, and a change from a timing belt to a timing chain improved reliability. A further revision of the 525i engine took place in 1993, when VANOS was added to the M50 engine which was designated the M50TU. The TU represents a Technical Update, reflecting the variable valve timing technology (VANOS) added to the intake camshaft. VANOS brought no horsepower increase, but flattened the torque curve from about 3,000 rpm up to redline at approximately 6,300 rpm. M50 engine was the most popular variant sold in NA. Since models equipped with M50 engine lack power found in M30, M60b40 or S38 engines, many performance upgrades are available. For instance, for mere few hundred dollars, owners can install an aftermarket ECU chip to improve performance and even gain some fuel economy. Owners looking for a real upgrade in power have gone towards forced induction or an engine swap. Most popular engine swap is S50, and S52 found in E36 M3 and other M cars. They require very little modification to fit in 525i models.
