ERR737 | Oil Filler Cap - 2.5L NA Diesel | Defender 1987-2006

ERR737 serves as the oil filler cap for the rocker cover breather on 2.5L 4-cylinder naturally aspirated diesel Defenders. It seals the filler opening to prevent dirt and moisture ingress while allowing crankcase ventilation through the breather; check the cap and its seal during routine oil services and replace if cracked or worn to avoid contamination or leaks.

If you are unsure of compatibility with your vehicle, you can also confirm by checking against your V.I.N. Simply reach out to us with your V.I.N and desired part number via our Contact page or use our Finding Part Numbers page.

Inspect the oil filler cap at each oil service and replace if the rubber seal is cracked, the cap is damaged, or threads are worn; replacing a degraded cap prevents leaks and contamination. If unsure, consult the vehicle manual or a qualified technician.

• C8 products are usually supplied by Britpart.
• L8 products are genuine Land Rover parts.

All products and accessories available on LRDirect.com come with a 2-year warranty.