LR075664 - Land Rover Cap-filler fuel filler

Land Rover Defender Locking Fuel Filler Cap – LR075664 (TD5 & TDCi, 1998–2016)

LR075664 is the locking fuel filler cap used on Land Rover Defender 90, 110 and 130 models from the late 1990s through the end of L316 production, covering both TD5 and TDCi (Puma) engines. Designed for Defenders equipped with the later plastic fuel tanks, the cap threads directly onto the filler neck and provides a secure closure, integrating a metal‑barrel lock and paired keys to prevent fuel contamination or unauthorised access.

Genuine versions arrive boxed with the Land Rover branding and correct supersession detail, replacing earlier references LR032977 and WLD500200, and follow the original profile engineered for both diesel and TDCi applications.

The cap’s locking assembly is built around the later Defender key‑barrel design, offering a smooth action when locking or unlocking, with a positive turn‑stop when fully secured. This ensures consistent tank ventilation and sealing behaviour, preventing dust and water ingress during off‑road driving while maintaining correct venting characteristics for TD5 and Puma fuel systems.

LR075664 is commonly renewed during tank‑neck refurbishments, filler‑surround replacements, or when older caps have worn seals, damaged threads, or stiffened key barrels. Because the cap forms part of the vehicle’s evaporative and fuel‑delivery interface, correct fit and sealing help maintain system reliability across a wide range of operating environments, particularly on vehicles that see regular exposure to mud, vibration and fuel‑splash cycles.