Standard Ignition VR-473 Voltage Regulator

Charging System Voltage Regulator for BMW

Standard Ignition VR-473 is a 12-volt charging system voltage regulator that mounts on the alternator and uses a single terminal with no connector. It is built for BMW charging system service where stable alternator output is needed for consistent electrical performance.

Compatible With BMW 318i, 318is, 325i, 325is, 325iX, 325e, 328e, 525i, 528e, 535i, 535is, 735i, 735iL, 750iL, 850i, 850Ci, 850CSi, M3, and M5 applications listed below. Standard Ignition VR-473 is a direct-fit charging system service part for alternator-mounted regulator replacement.

• 12-volt charging system voltage regulator
• Alternator-mounted design
• Single-terminal configuration
• No connector, no hardware, and no instructions included
• Dimensions: 76.962 x 50.292 x 41.402 mm; 3.03 x 1.98 x 1.63 in.
• Cross-references TYC 30097 for the same application

Detailed Product Overview

This Standard Ignition voltage regulator is used to control alternator output in BMW electrical systems. The VR-473 is listed for multiple BMW 3 Series, 5 Series, 7 Series, and 8 Series models, including 1991-1994 BMW 318i and 318is, 1987-1991 BMW 325i and 325is, 1988-1991 BMW 325iX, 1984-1987 BMW 325e, 1984-1986 BMW 528e, 1985 and 1986-1988 BMW 535i, 1987-1990 BMW 735i, 1988-1990 BMW 735iL, 1991-1992 BMW 850i, 1994 BMW 850Ci, and 1994 BMW 850CSi. It also covers BMW M3 and M5 applications shown in the fitment data.

Part number VR-473 is also referenced by 89058265, 12311271664, R978, VR639, and VR826. Use the listed fitment notes to confirm alternator amperage where specified, such as 80, 90, 105, 115, or 140 amp configurations.

What It Helps Address

• Unstable alternator charging output
• Battery warning light concerns related to regulator failure
• Overcharging or undercharging conditions
• Electrical system voltage fluctuation
• Charging performance issues on BMW alternator service

Installation Notes and Tips

Install the regulator at the alternator location and verify the vehicle’s alternator amperage and application notes before replacement. This part uses a no-connector, one-terminal design, so matching the original regulator style is important. Compare the dimensions and connector layout to the removed unit before installation. Standard Ignition VR-473 is listed for BMW 318i, 318is, 325i, 325is, 325iX, 325e, 525i, 528e, 535i, 735i, 735iL, 750iL, 850i, 850Ci, 850CSi, M3, and M5 applications in the fitment table.

Quality Assurance

Standard Ignition supplies electrical service parts for charging system repair, and this regulator is cataloged with OE-style interchange references for application matching. Confirm fitment against the vehicle’s alternator specification and the listed notes before installation.