Standard Ignition RY-1658 Fuel Injection Relay

Fuel Injection Relay for BMW Applications

Standard Ignition RY-1658 is a 12-volt fuel injection relay built for BMW fuel delivery systems that require a 5-terminal, blade-style relay with a square connector. With a 30 amp amperage rating and male terminals, it supports consistent relay operation in the fuel injection circuit.

Compatible With BMW 533i, 635CSi, 735i, 735iL, M3, 740i, and 740iL applications across the listed model years, this relay is a direct-fit electrical service part for select classic and late-1980s to mid-1990s BMW platforms. Standard Ignition RY-1658 is also cross-referenced to Four Seasons 20956 for the same application.

Key Features

• Fuel injection relay for air and fuel delivery systems
• 12-volt electrical rating
• 30 amp amperage rating
• Square connector shape
• 5 blade terminals with male terminal gender
• Direct replacement for select BMW fuel injection relay applications
• Standard Ignition RY-1658 part number for service identification

Detailed Product Overview

This relay is used in the fuel injection control circuit to help manage electrical switching for the engine’s fuel delivery system. Standard Ignition RY-1658 is specified with a square connector, five blade terminals, and a 30 amp rating, making it a practical replacement for vehicles that call for this relay configuration. It is listed for 1983-1984 BMW 533i, 1985-1989 BMW 635CSi, 1985-1992 BMW 735i, 1988-1990 BMW M3, 1988-1992 BMW 735iL, 1993-1995 BMW 740i, and 1993-1994 BMW 740iL.

For buyers searching by application, this BMW fuel injection relay is a fitment-specific electrical component for select BMW 7 Series, 3 Series, and 6 Series models. The part number RY-1658 is useful when matching an existing relay or confirming service replacement needs.

Common Issues This Relay Can Address

• Fuel injection circuit relay failure
• Intermittent fuel delivery electrical operation
• No-start condition related to relay switching
• Engine stalling caused by relay contact wear
• Electrical replacement need for a damaged or aging fuel injection relay

Installation Notes and Tips

Verify the connector shape, terminal count, terminal type, and voltage rating before installation. Match the existing relay layout to the square 5-terminal blade configuration and confirm the vehicle application against the listed BMW fitment before replacement. Because mounting bracket included is listed as no, reuse the existing mounting arrangement if the vehicle uses one.

Quality Assurance

Standard Ignition supplies this relay as a service replacement part identified by RY-1658. Confirm the original relay specifications and vehicle fitment before installation to ensure proper electrical matching.