Motorad MO319 Engine Oil Filter Cap

Engine Oil Filter Cap for Audi and Volkswagen

The MotoRad MO319 engine oil filter cap is a specific-fit replacement for select Audi and Volkswagen applications that use a screw-on plastic filter housing cap. Built from OEM-approved plastic with a rubber seal, it is made to maintain a secure oil filter housing closure under demanding temperature and operating conditions.

For Audi A3, Q5, A4, A6, TT, and Volkswagen GTI or Golf R service work, the MO319 provides a direct replacement option that matches the original cap style and thread size. The black round cap includes indicator markings for easier service identification.

Key Features

• Specific-fit engine oil filter cap for select Audi and Volkswagen models
• Plastic construction with black finish
• Screw-on attachment type
• Round shape with indicator markings
• Rubber gasket or seal included
• Thread diameter: 2.67 in. / 67.82 mm
• Head diameter: 1.25 in. / 31.75 mm
• Cap depth: 1.66 in. / 42.16 mm

Detailed Description

MotoRad MO319 is an engine oil filter cap engineered for OE-style service replacement on vehicles that use a plastic screw-on filter housing cap. The cap is manufactured to meet or exceed OEM quality standards in ISO TS16949 facilities and uses materials selected for durability in extreme heat and cold. This makes it a practical choice when replacing a worn, cracked, or damaged oil filter cap on Audi and Volkswagen engines.

This part cross-references Dorman OE Solutions 921-169 for the same application. It is also associated with OE reference numbers 06L115401B and 06L115401D. The MO319 is commonly searched as an oil filter housing cap for 2015-2020 Audi A3, 2021-2025 Audi Q5, and 2022-2026 Volkswagen GTI service applications.

What It Is Used For

• Replacing a cracked or brittle oil filter housing cap
• Restoring a secure seal at the oil filter housing
• Addressing oil seepage from a damaged cap or seal
• Correcting service issues caused by worn indicator markings
• Maintaining proper closure on screw-on filter housing systems

Installation Notes and Tips

Verify the thread diameter and housing style before installation. The MO319 is a specific-fit cap, so confirm vehicle application against the oil filter housing design on the engine. Inspect the sealing surface and gasket area during service, and replace the cap if the housing threads or cap body show damage.

Compatible With select Audi and Volkswagen models including 2015-2020 Audi A3, 2021-2025 Audi Q5, 2016-2025 Audi A6 Quattro, 2018-2024 Audi A5 Quattro, and 2022-2026 Volkswagen GTI. Additional fitment includes Audi A4, A4 allroad, Q3, Q7, TT, TTS, S3, A7, A7 Sportback, Q5 PHEV, Volkswagen Golf R, Arteon, Passat, and Beetle.

Quality Assurance

MotoRad manufactures this filter cap using OEM-approved materials and builds it to meet or exceed OEM quality standards. Production takes place in ISO TS16949 manufacturing facilities, supporting consistent fit and material quality for routine engine service.