Standard Ignition RY-1789 Main Relay

Subaru Main Relay Replacement

Restore reliable electrical switching with this Standard Ignition main relay, part number RY-1789. Built with a 12-volt rating, rectangular connector shape, and 4 male blade terminals, it is a direct-fit relay solution for a wide range of Subaru applications.

Compatible with Subaru Crosstrek, Forester, Impreza, Legacy, Outback, Ascent, BRZ, WRX, WRX STI, and XV Crosstrek models across multiple years, this relay supports consistent power delivery in the vehicle’s electrical system.

Key Features

• Standard Ignition RY-1789 main relay for automotive electrical repair
• 12-volt relay with rectangular connector shape
• 4-terminal design with male blade terminals
• No mounting bracket included
• Fits a broad range of Subaru models, including Subaru Forester, Subaru Impreza, and Subaru Outback

Detailed Description

The Standard Ignition RY-1789 is a main relay used in Subaru electrical systems to control power flow to key circuits. Its 12-volt design, rectangular housing interface, and blade-style male terminals support a secure electrical connection in the original relay location. This part cross-references Bosch 16169 for the same application.

Fitment includes 2016-2024 Subaru Crosstrek, 2009-2024 Subaru Forester, 2008-2024 Subaru Impreza, 2010-2024 Subaru Legacy, 2009-2024 Subaru Outback, 2019-2023 Subaru Ascent, 2022-2023 Subaru BRZ, 2013-2020 Subaru BRZ, 2012-2023 Subaru WRX, 2013-2021 Subaru WRX STI, and 2013-2015 Subaru XV Crosstrek. The part number RY-1789 is also referenced by 25232AA100, AR7293, and R7292.

Common Issues This Relay Can Address

• Intermittent electrical power to relay-controlled circuits
• No-start conditions related to relay failure
• Accessory or system operation problems caused by weak relay contacts
• Electrical switching faults in Subaru main relay circuits
• Replacement needs after relay wear, heat damage, or contact fatigue

Installation Notes and Tips

Verify the connector shape, terminal count, and terminal type before installation. Match the original relay location and confirm the vehicle uses a 12-volt main relay with a rectangular 4-blade male terminal layout. Inspect the connector terminals for corrosion or heat damage before plugging in the replacement.

Quality Assurance

Standard Ignition supplies automotive electrical components for service and repair applications. RY-1789 is built to match the specified relay configuration for the listed Subaru fitments, helping support dependable electrical system operation.