Dorman 977-129 Fuel Injection Throttle Body

Overview of Dorman Fuel Injection Throttle Body 977-129

The Dorman 977-129 Fuel Injection Throttle Body is designed for precise airflow control in Mazda 3 and Mazda 5 vehicles. This electronic throttle body ensures consistent engine performance by regulating air intake efficiently.

• Compatible with Mazda 3 and Mazda 5 models
• Electronic throttle body type for accurate throttle response
• Constructed from durable aluminum with a silver finish
• Inlet diameter of 2.85 inches with flanged inlet type
• Single outlet with a 2.16-inch bore diameter and non-flanged outlet
• Supports gas fuel injection systems with an airflow rate of 90
• Does not include mounting hardware, gaskets, fuel injectors, or idle air control motor

Detailed Product Description

The Dorman 977-129 throttle body is engineered to meet the specifications of gas fuel injection systems in Mazda 3 and Mazda 5 vehicles. Featuring an aluminum body with a silver finish, it offers durability and corrosion resistance. The electronic throttle body design provides precise control over the throttle plate, improving engine responsiveness and fuel efficiency. The inlet diameter measures 2.85 inches with a flanged connection, while the outlet is non-flanged with a 2.16-inch bore diameter, ensuring proper fitment and airflow. This part is designed for use in gas fuel systems and supports an airflow rate of 90, making it suitable for maintaining optimal engine performance.

Common Applications and Issues Addressed

• Restores proper throttle response in Mazda 3 and Mazda 5 vehicles
• Resolves rough idling or stalling caused by faulty throttle bodies
• Eliminates hesitation or poor acceleration due to throttle body wear
• Addresses check engine light codes related to throttle position sensor errors
• Improves fuel efficiency by ensuring accurate air-fuel mixture control

Installation Notes and Tips

Installation of the Dorman 977-129 throttle body requires removal of the existing throttle body and careful cleaning of the mounting surface. Since mounting hardware and gaskets are not included, ensure you have the correct components before beginning installation. Proper torque specifications should be followed to avoid air leaks. It is recommended to perform a throttle body relearn procedure or reset the vehicle’s ECU after installation to ensure optimal performance.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. While specific warranty details for part number 977-129 are not provided here, Dorman typically offers limited warranties covering defects in materials and workmanship. Refer to official Dorman documentation for exact warranty terms.