Restore switched power to your fuel and ignition circuits with the Standard Ignition Fuel Injection Relay / Fuel Pump Relay / Ignition Relay / Main Relay (MPN RY-423). It drops in as a direct-fit replacement across a wide range of Honda and Acura applications, including the 2001-2003 Acura CL, 2001-2002 Acura MDX, 1999-2003 Acura TL, 1998-2002 Honda Accord, 1998-2005 Honda Odyssey, 2003-2004 Honda Pilot, and 1998-2001 Honda Prelude (All engines) — see the Buyer's Guide tab for the full list.
This relay uses a low-current control signal to switch higher-current power to the circuits it feeds, so the fuel pump, injectors, and related systems energize on command.
- Electrical switching: a small trigger current closes the internal contacts to pass power to the connected fuel and ignition circuits.
- Direct fit: designed to install in place of the original relay on the listed applications.
- Multiple roles: cataloged as a fuel injection, fuel pump, ignition, and main relay to match how the circuit is used on each vehicle.
Signs this relay may need replacing include a no-start, intermittent stalling, or hard starting when the engine is hot. Those conditions can have other causes, so diagnose the circuit first; if a failed relay is the cause, RY-423 replaces it. Manufacturer part number RY-423 (also RY423).
