Mazda MPS / DISI Turbo Fuel Pressure Relief Valve

High quality replacement fuel pressure relief valve for Mazda MPS / Mazdaspeed DISI Turbo engines.

This valve is located on the high pressure fuel rail and is designed to relieve excess fuel pressure when required. A weak or faulty relief valve can cause fuel pressure issues, poor running, hesitation, boost cut style symptoms, or loss of performance under load.

Suitable For

Mazda 3 MPS / Mazdaspeed 3
Mazda 6 MPS / Mazdaspeed 6
Mazda CX-7 2.3 Turbo
Other Mazda 2.3 DISI Turbo applications

Please send your rego before ordering if you are unsure on fitment.

Common Symptoms Of A Faulty Relief Valve

Hard starting
Poor idle
Fuel pressure dropping under load
Hesitation or misfire under boost
Loss of power
Fuel pressure related fault codes
Engine cutting or breaking up at higher RPM
Unable to hold commanded fuel pressure

Features

Direct replacement fuel pressure relief valve
Suitable for Mazda DISI Turbo engines
Helps restore correct fuel pressure control
Good replacement when diagnosing fuel rail pressure issues
Cost effective option compared with replacing larger fuel system components

Important Fitment Note

There can be different fuel system parts depending on model, year, market, and engine setup.

Please send your vehicle rego before ordering so we can check fitment where possible.

What’s Included

1x Fuel Pressure Relief Valve

Notes

Photos are for reference only. Actual item may vary slightly depending on supplier batch.

Professional installation is recommended. Fuel systems operate under high pressure, so the vehicle should be depressurised safely before removal or installation.

JohnnyParts NZ supplies parts only and cannot diagnose your vehicle over messages. If you are unsure whether this is the failed part, please have the vehicle checked by a qualified mechanic.