GBR 842-12370 Fuel Injector

Reman Multi Port Fuel Injector for Mazda Applications

GBR Reman Multi Port Fuel Injector Part Number 842-12370 is a remanufactured OEM-style fuel injector built for direct replacement in select Mazda fuel systems. It is tested across multiple operating conditions to verify flow rate, spray pattern, coil resistance, form, fit, and function.

This injector line is remanufactured in the USA using a 15-step process and includes new external seals and o-rings. This part cross-references Bosch (e.g., 0280158103, 0280158287) for the same application.

Key Features

• Remanufactured OEM fuel injector for multi port fuel injection systems
• 100% tested under multiple operating conditions
• Verified for flow rate, spray pattern, coil resistance, form, fit, and function
• Includes new external seals and o-rings
• Built in a U.S.A. remanufacturing facility
• Part number 842-12370 for catalog and service lookup

Detailed Description

GBR’s Reman Multi Port Fuel Injector line is engineered as an OE-spec replacement for Mazda MX-5 Miata, Mazda 3, Mazda 3 Sport, Mazda 5, and Mazda 6 applications listed below. The remanufacturing process restores injector performance to meet or exceed original equipment requirements, making it a practical choice when addressing fuel delivery concerns on 2004-2015 Mazda vehicles. Part number 842-12370 is a direct-fit service part for the listed applications.

Compatible fitment includes Fits 2006-2015 Mazda MX-5 Miata, N/A; Fits 2010-2013 Mazda 3, N/A; Fits 2010-2013 Mazda 3 Sport, N/A; Fits 2008-2010 Mazda 5, N/A; Fits 2004-2009 Mazda 3, N/A; Fits 2009 Mazda 3 Sport, N/A; Fits 2006-2008 Mazda 6, N/A.

What It Helps Address

• Hard starting caused by inconsistent fuel delivery
• Rough idle related to injector spray or flow imbalance
• Misfire concerns tied to injector coil or spray pattern issues
• Poor throttle response from restricted or uneven fuel atomization
• Fuel trim irregularities from a worn or out-of-spec injector

Installation Notes and Tips

Use the vehicle-specific service procedure when replacing the injector. For 2004-2009 Mazda 3 and 2009 Mazda 3 Sport applications, replace the fuel filter at the same time and refer to Technical Bulletin TB-0119-EFS. Confirm connector condition, inspect the fuel rail sealing surfaces, and verify proper seating of the new seals and o-rings before startup.

Quality Assurance

Each injector is remanufactured and tested to meet or exceed OE specifications for the listed performance criteria. The process includes inspection and validation of critical operating characteristics to support consistent fuel delivery in Mazda MX-5 Miata, Mazda 3, Mazda 3 Sport, Mazda 5, and Mazda 6 applications.