Gates 31761 Fuel Tank Cap

Regular Locking Fuel Cap for Emissions-Controlled Tanks

The Gates 31761 Regular Locking Fuel Cap is built for vehicles that need a secure, emissions-compliant fuel tank cap with a standard fit. It combines locking security with a two-way pressure relief and vacuum relief valve to let the tank breathe while helping contain fuel vapors.

Compatible With select Audi, BMW, Acura, Honda, Ford, Lincoln, Mercury, Mazda, Volkswagen, Isuzu, and Jaguar applications, this Gates Regular Locking Fuel Cap is a direct replacement for many older fuel systems that use a regular fuel cap design. The 31761 part number is also cross-referenced to Monroe Shocks & Struts 172286 and 182286 for the same application.

Key Features

• Lockable fuel cap design for added security
• Regular fuel cap style with shallow cam construction
• Emission control venting to support evaporative emissions systems
• Two-way pressure relief and vacuum relief valve
• Meets OEM specifications and Federal and State emission requirements
• Thread diameter: 1.5 in.
• Shell diameter: 2.63 in.
• Depth: 2.09 in.

Product Details

Gates Regular Locking Fuel Cap 31761 is engineered for fuel tanks that require a standard locking cap with emission control venting. The shallow cam type and regular fuel cap profile help maintain proper sealing on supported applications, while the pressure and vacuum relief valve allows the tank to breathe without releasing fuel fumes unnecessarily. This makes it a practical replacement for vehicles such as the Honda Civic, Honda Accord, Ford F-150, and Acura Integra where the correct cap style and emissions function matter.

What This Fuel Cap Helps Address

• Loose, damaged, or missing locking fuel cap
• Fuel vapor odor caused by a worn seal or venting issue
• Check engine light concerns related to evaporative emissions faults
• Fuel tank pressure imbalance from a failed relief valve
• Incorrect cap style on vehicles requiring a regular locking fuel cap

Installation Notes and Tips

Verify the cap style, thread diameter, shell diameter, and cam type before installation. Confirm the vehicle’s emissions system requirements and match the replacement to the original fuel cap design. For fitment examples, this part fits 1978-1989 Honda Accord, 1978-1991 Honda Civic, 1979-1981 Ford Mustang, 1977-1978 Ford F-150, and 1997-1998 BMW 540i. It also fits 2009 Audi A4 Quattro, N/A. Always inspect the filler neck and sealing surface for wear before installing a new cap.

Quality Assurance

Gates manufactures this locking fuel tank cap to meet OEM specifications and Federal and State emission requirements. Part number 31761 is designed as an emissions-control replacement for supported applications, including many Honda, Ford, Lincoln, Mercury, Mazda, and Acura models.