Dorman 977-557 Fuel Injection Throttle Body

Electronic Throttle Body for Ford and Lincoln

Dorman 977-557 is a 100% new electronic fuel injection throttle body built to match original equipment fit and performance. It uses a corrosion-resistant aluminum housing, a new throttle position sensor, and a new circuit board for dependable throttle response on gas applications.

Compatible with select Ford Expedition, Ford F-150, Ford F-250 Super Duty, Ford F-350 Super Duty, Lincoln Navigator, and Lincoln Mark LT applications, this throttle body supports direct replacement service for common driveability concerns. The Dorman 977-557 is a practical OE-style solution for vehicles that need a replacement electronic throttle body assembly.

Key Features

• Electronic throttle body for gas fuel systems
• Corrosion-resistant aluminum housing with silver finish
• Throttle position sensor included
• Female blade electrical connection with 6 terminals
• 3.353-inch bore diameter
• 100% new construction for replacement service
• No gasket or seal included
• No installation hardware included

Detailed Product Overview

This fuel injection throttle body is built for direct-fit replacement on 2004-2014 Ford and Lincoln trucks and SUVs listed in the fitment data. It is engineered as an electronic throttle body, with the sensor and circuit board already integrated into the assembly for consistent throttle control. The aluminum body helps resist corrosion, while the OE-style design supports proper fitment in applications such as the Ford Expedition and Lincoln Navigator.

This part cross-references Cardone New 6E-6001 for the same application. Part number 977-557 is also referenced against OE number 3L3Z9E926AA in interchange data.

Common Problems This Part Can Address

• Throttle response issues caused by a worn electronic throttle body
• Driveability problems related to a failing throttle position sensor
• Corrosion-related throttle body deterioration
• Idle or acceleration inconsistency tied to throttle control wear
• Replacement needs after electronic throttle body circuit failure

Installation Notes and Tips

Verify connector style, bore size, and vehicle application before installation. This unit uses a female blade electrical connection and does not include a gasket or seal, so inspect related sealing components during service. Confirm fitment for 2005-2014 Ford Expedition, 2005-2014 Lincoln Navigator, 2004-2010 Ford F-150, 2005-2010 Ford F-250 Super Duty, 2005-2010 Ford F-350 Super Duty, 2006-2008 Lincoln Mark LT, and 2010 Lincoln Mark LT from 2/01/10.

Quality Assurance

Dorman supplies this throttle body as a new replacement component built to match original equipment specifications for fit and performance. The updated sensor and circuit board support reliable operation in compatible Ford and Lincoln applications.