Standard Ignition RY-433 Main Relay

Standard Ignition RY-433 Main Relay

Standard Ignition RY-433 is a 12-volt main relay built for Toyota and Lexus electrical systems that use a 4-terminal regulator relay layout. With a 20 amp amperage rating, female rectangular connector, and male blade terminals, it supports reliable circuit control in the applications listed below.

Key Features

• Main relay for regulator function in 12 V systems
• 20 A amperage rating for the specified electrical load
• Female rectangular connector with 1 connector interface
• 4 male blade terminals for direct electrical connection
• Fits Toyota Camry, Toyota Celica, Toyota Avalon, Toyota Supra, Toyota Cressida, Toyota Solara, Lexus ES300, and Lexus ES250 applications listed below
• Standard Ignition RY-433 cross-references DENSO Auto Parts 567-0016 for the same application

Detailed Description

This Standard Ignition RY-433 main relay is specified for regulator control in select Toyota and Lexus vehicles, including 1997-2002 Lexus ES300, 1988-2000 Toyota Camry, 1995-1999 Toyota Avalon, 1997-1999 Toyota Celica, 1988-1992 Toyota Supra, 1990-1991 Lexus ES250, and 1999-2001 Toyota Solara. It uses a rectangular female connector and 4 blade-style male terminals, matching the electrical interface called out in the fitment data. Standard Ignition RY-433 is also referenced by several interchange numbers used in the same application family.

What It Is Used For

• Restoring regulator relay operation in Toyota Camry electrical systems
• Replacing a failed main relay in Lexus ES300 charging or control circuits
• Addressing intermittent electrical switching in Toyota Avalon and Solara applications
• Correcting relay-related issues in Toyota Celica, Supra, and Cressida models with 4-terminal layouts
• Resolving no-output or unstable relay control conditions tied to the regulator circuit

Installation Notes and Tips

Verify the connector shape, terminal count, and terminal style before installation. This relay does not include a mounting bracket and is not rated for continuous duty. Confirm the vehicle uses the 4-terminal configuration shown in the fitment data, especially on Toyota Camry and Toyota Celica applications noted with 4 Term. in the listing.

Quality Assurance

Standard Ignition RY-433 is built to the published electrical specifications for the listed Toyota and Lexus applications. Confirm part number RY-433 against the original relay and vehicle connector layout before replacement.