Keep engine oil sealed in and contaminants out with the Gates Engine Oil Filler Cap 31281. It installs as a direct-fit replacement across a wide range of applications, including the 2004-2015 Audi A4 (L4-1.8L, L4-2.0L, V6-3.0L, V6-3.2L), 2003-2009 Dodge Sprinter 2500 (L5-2.7L, V6-3.0L, V6-3.5L), and 2008-2014 Freightliner Cascadia — see the "Vehicles it fits" section for the full list of makes, models, years, and engines.
- Durable construction: made of impact-resistant plastic or heavy-gauge metal for long service life.
- Special finish: resists corrosion and offers protection from high under-hood temperatures.
- Broad coverage: a wide range of applications spanning many makes and models.
- Built to OE-level standards: engineered for factory fit, form, and performance.
The oil filler cap closes off the oil fill opening, sealing engine oil inside while blocking dirt, debris, and moisture and helping maintain the crankcase seal. Signs this cap may need replacing include oil seepage or an oil smell around the fill opening, or a cap that is loose, cracked, or no longer sealing. If a worn or damaged filler cap is the cause, this replaces it.
Country of origin: China. Manufacturer part number 31281.
Frequently Asked Questions
What does the Gates 31281 do?
It seals the engine oil filler opening, keeping oil sealed inside while blocking out dirt, debris, and moisture and helping maintain the crankcase seal.
Will this oil filler cap fit my vehicle?
It's a direct-fit replacement for a wide range of applications, including the 2004-2015 Audi A4 and 2003-2009 Dodge Sprinter 2500. Check the "Vehicles it fits" section to confirm your exact year, model, and engine.
What is the cap made of?
Gates makes these caps from impact-resistant plastic or heavy-gauge metal for long service life; the exact material depends on the application.
How do I know when to replace the filler cap?
Signs include oil seepage or an oil smell around the fill opening, or a cap that is loose, cracked, or no longer sealing properly.
How many caps come in this listing?
This listing is for one cap, and the listed applications use one per vehicle.
