Honda Acura Accord Civic CRX Integra Legend Prelude OBD0 Main Relay

This is a sale for a brand new genuine Honda Acura Main Relay Assembly, the Mitsuba RZ-0063 or RZ-0080 from Honda Motors, Japan. This main relay model fits a range of Honda Acura vehicles with A, B, C and D-series engines from 1.5L to 2.7L; VTEC and non-VTEC, such as, Accord, Civic, CRX, Integra, Legend & Prelude. It will fit and work compatibly with OBD0 Honda Acura vehicles. Please e-mail us for your application if uncertain.

The main relay actually contains two individual relays. The first relay is energized whenever the ignition switch is on which supplies battery voltage to the ECU, power to the fuel injectors, and power for the second relay. The second relay is energized for two seconds when the ignition switch is on, and when the engine is running which supplies power to the fuel pump.

When the main relay is at fault, the engine will usually fire, run for a split second and then stall, as the remaining fuel under pressure is used up. Continual cranking will only make the situation worse, with the engine not firing at all in the end. When you turn the ignition key to position II (ignition on) you should see the Check Engine indicator on the dash light up and extinguish. Exactly timed with this lamp, you should hear a click and the fuel pump turn on and off. If you do not hear a click and the fuel pump, then the main relay is likely to be at fault.

The main relay is usually located near the fuse box, mounted on a bracket. When you have a problem with the main relay, thumping this part of the dash, it is likely that the car will spring into life again as the joint is disturbed, unless the problem is severe.

The joint in the above-mentioned is a dry joint in the main relay, which can cause an intermittent or no connection. The main relay controls power to the ECU, and the fuel pump. With no power to the rest of the fuel-injection system, or fuel pump, you won't be going anywhere! Dry joints problems are resolved in recent production batches of Honda Acura main relays as physically attested by their on-board soldering quality.

Buyers are welcome to email us for installation instructions if required.

Note: Lower cost FedEx Envelope (up to 0.5-kg) shipping option available, please email us for shipping quotes.