Dorman® 977-331 - Fuel Injection Throttle Body

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Product Details

Dorman Auto Repair Parts

Fuel Injection Throttle Body by Dorman®. The Electronic Throttle Body Assembly frequently requires replacement due to internal electronic sensor failure and excessive wear and tear. Dorman's OE FIX solution provides a redesigned electronic board, which features a new Hall Effect Sensor for increased reliability and a longer service life. Sold as a complete unit, Throttle Body features a butterfly valve which is electronically controlled by the Engine Control Unit to precisely open and close to regulate the fuel/air mixture. Since this part is essential to the operation of your vehicles engine, quality tests on this part include on-vehicle testing and corrosion resistance testing to ensure this part conforms to product standards for durability and performance.


Adjustable: No
Color/Finish: Silver
Connector/Terminal Type: Blade
Electrical Connection Type: Female Socket
Fuel Injectors Included: No
Fuel System Type: Gas
Gasket or Seal Included: No
Housing Material: Aluminum
Idle Air Control Motor Included: No
Inlet Type: Flange
Installation Hardware Included: No
Outlet Type: Flange
Package Contents: 1 Throttle Body
Terminal Count: 6
Throttle Body Mounted: No
Throttle Body Spacer Included: No
Throttle Body Type: Electronic
Throttle Position Sensor Included: Yes
Venturi Quantity: 0


  • Aluminum casting construction for an exact fit, performance match and corrosion resistance
  • Exact fit for bolt-on and plug-in installation
  • Direct replacement restores proper engine function
  • The Electronic Throttle Body Assembly maintains the correct volume of air flow into the engine

Dorman Products Inc. is well-known as a leader in providing quality auto parts to the aftermarket. They have earned their reputation for excellence from over three decades of experience in providing automotive replacement parts, fasteners and service line products primarily for the automotive aftermarket. Their prestigious position stems from a unique combination of application expertise, innovative product design, and breadth of product offerings, many of which are not conveniently or economically available elsewhere.

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Warranty Information

  • Hybrid battery – fleet: 12 months from the date of purchase.
  • Hybrid battery – non-fleet: 36 months from the date of purchase.
  • Manifold Converters: 60 months or 50,000 miles from the date of purchase.
  • Heavy Duty DPF / DOC: 24 months from the date of purchase.
  • Light Duty DPF / DOC: 24 months or 36,000 miles from the date of purchase.
  • Heavy Duty EGR Coolers: 36 months from the date of purchase.
  • Light Duty EGR Coolers: Limited Lifetime
  • All other products: lifetime.

Dorman Products warrants that the product is free from defects in material and workmanship under normal use and service for the period stated above. Dorman will replace any of its products that in Dorman's reasonable determination does not comply with the foregoing warranty. This warranty becomes null and void if the damage is caused by: misuse, abuse or accident; the attachment of any unauthorized accessory; alteration to the product; improper installation; exposure to harsh weather and/or chemicals; or lack of proper maintenance. This warranty also becomes null and void if the product is opened or any sticker is tampered with, broken, or missing, or if the damage is caused by any other condition that is beyond the control of Dorman Products.

In all cases, Dorman shall not be responsible for any type of incidental, consequential, or special damages. All other warranties, including the implied warranties of fitness for a particular purpose and the implied warranty of merchantability, are excluded.

By accepting this product, you hereby waive and release any claim now or hereafter existing against Dorman Products, its employees, officers, directors, agents and customers, on account of any and all claims, demands, suits, causes of action and all legal proceedings, whether civil or criminal, damages, losses, liabilities, (including, but not limited to, strict liability in tort), obligations, penalties, judgments or fines and other sanctions.

Federal and/or state laws may provide you with other warranties for this product. Some states do not allow the exclusion or limitation of incidental or consequential damages.

Magnuson-Moss Warranty Act:
Legally, a vehicle manufacturer cannot void the warranty on a vehicle due to an aftermarket part unless they can prove that the aftermarket part caused or contributed to the failure in the vehicle (per the Magnuson Moss Warranty Act (15 U.S.C. 2302(C)) Learn More

Vehicle Fitment

Lexus GS
2018 Lexus GS450h
2017 Lexus GS450h
2016 Lexus GS450h
Lexus RX
2018 Lexus RX
2017 Lexus RX
2016 Lexus RX
Toyota Tacoma
2018 Toyota Tacoma
  • 3.5L
2017 Toyota Tacoma
  • 3.5L
2016 Toyota Tacoma
  • 3.5L

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