Replacement Engine Oil Cap — Direct Fit for Jaguar Models Compatible vehicles Jaguar Vanden Plas: 1998–2003 Jaguar XType: 2002–2007 Jaguar XJ8: 1998–2003, 2005 Jaguar XJR: 1998–2001 Jaguar XK8: 1997–2004, 2006 Jaguar XKR: 2000–2006 Reference numbers OEM / crossreference: 31550, MJA4440BA Key benefits — why you need this cap Maintains proper crankcase pressure: Designed with a maximum pressure rating of 120 ± 2 KPA to help stabilize internal pressure and support normal engine operation. Reduces wear and contamination: Stable plastic construction helps reduce oil dilution and cylinder wear by maintaining a reliable seal and venting behavior. Improves efficiency and emissions performance: By helping control oil contamination and pressure, the cap contributes to lower fuel consumption and reduced exhaust emissions compared with a failing or leaking cap. Durable under stress: Engineered to resist extreme heat and vibration commonly encountered in daily driving and higherload conditions. Product details and specifications Item dimensions (L × W × H): 6.22 × 6.22 × 3.8 cm Color: Black Weight: 0.05 kg Material: Stable plastic designed for thermal and vibration resistance Cap maximum pressure rating: 120 ± 2 KPA What makes this cap stand out Direct compatibility with multiple Jaguar models and listed years, matching reference numbers 31550 and MJA4440BA for proper fit and function. Lightweight, heatresistant plastic reduces risk of cracking or deformation compared with lowerquality alternatives. Precisely rated pressure performance to support consistent venting and sealing behavior. Practical use scenarios Routine maintenance: a worn or damaged oil cap during scheduled service to restore a proper seal, maintain crankcase pressure, and prevent oil contamination. after failure: Swap in this cap if your original cap is cracked, leaking, or no longer maintains proper pressure to reduce oil dilution and the risk of increased cylinder wear. Track or mileage vehicles: Use as a durable replacement for vehicles exposed to higher temperatures and vibration to help preserve engine efficiency and emissions control. Fitment note Confirm compatibility with listed Jaguar models and production years before installation. Reference numbers 31550 and MJA4440BA can be used to verify fitment. This replacement cap provides a straightforward, durable option to restore proper crankcase sealing and pressure control on compatible Jaguar models.