Dorman 921-131 Engine Oil Drain Plug

Dorman 921-131 Engine Oil Drain Plug

Dorman 921-131 is a direct replacement engine oil drain plug for worn or damaged original equipment drain plugs. It is built with the correct M14-1.50 fine thread pitch to help maintain a secure seal during oil service on select Audi, Volkswagen, and other European applications.

For Audi A4, A6, Q5, Q7, S4, S5, SQ5, and related models, this oil drain plug is made to match the original thread size and sealing style for routine maintenance and leak control.

Key Features

• Direct replacement oil drain plug for engine oil pan service
• Steel construction with black finish
• Metric M14-1.50 fine thread design
• Hex head drive with 6-point socket engagement
• O-ring seal included for proper sealing
• Non-magnetic design
• Direct-fit replacement for select Audi and Volkswagen vehicles

Detailed Description

This Dorman engine oil drain plug is engineered to replace a damaged, stripped, or worn OE drain plug without changing the original thread pitch or sealing method. The metric M14-1.50 thread size, fine thread profile, and O-ring gasket help support a proper seal at the oil pan during drain-and-fill service. The steel body and hex head design provide a serviceable replacement for conventional oil changes on select Audi and Volkswagen models, including applications such as Audi A4 Quattro, A6 Quattro, Q5, Q7, and Volkswagen Touareg.

This part cross-references Monroe Shocks & Struts (e.g., N0138157) for the same application.

What It Helps Address

• Oil seepage from a worn drain plug seal
• Stripped or damaged drain plug threads
• Rounded or difficult-to-remove plug heads
• Improper sealing after oil service
• Replacement needs on select Audi and Volkswagen oil pans

Installation Notes and Tips

Use the correct special tool and a properly sized 6-point socket for installation and removal. Confirm the oil pan thread size is M14-1.50 before installation, and replace the sealing washer or O-ring as required during service. Clean the drain opening and inspect the threads for damage before tightening to the manufacturer’s specification.

Fits 2006-2018 Audi A4, A4 Quattro, A5, A5 Quattro, A6, A6 Quattro, A7, A7 Quattro, A8 Quattro, Q5, Q7, RS4, RS5, RS7, S4, S5, S6, S7, S8, SQ5; 2007-2018 Volkswagen Touareg; 2018-2020 Volkswagen Amarok; 2021-2022 Volkswagen Amarok.

Quality Assurance

Dorman manufactures this replacement drain plug as part of its Oil-Tite program, with OE-style thread matching and sealing details intended to restore proper service fitment on the listed applications. Part number 921-131 is built for direct replacement use on select European vehicles.