Product: Engine Coolant Reservoir Cap Key benefits — why you need this cap Prevents coolant loss and spills: provides a tight, secure seal for the coolant reservoir to stop liquid from spilling during driving or on rough roads. Durable under temperature extremes: made from quality materials that resist and low temperatures, do not deform or crack easily, and hold color for longterm use. Improves safety and maintenance: bright yellow finish with 3D stereoscopic marking makes the coolant reservoir easy to spot and reduces the chance of mixing coolant with other fluids (for example windshield washer fluid). The visible cap also prompts timely coolant checks and replacements to protect the cooling system. Features and performance Function: Replacement coolant reservoir cap designed to seal the engine coolant tank and maintain system integrity during normal and offroad driving. Material: quality, temperatureresistant construction that resists fading, deformation, and breakage for reliable longterm use. Design: Bright yellow color with raised 3D markings for quick identification and clearer user guidance. Fit and reliability: Engineered to match OEM fitment and sealing performance for the listed vehicles. Compatibility and replacement part numbers Compatible with many Chrysler/Jeep/Dodge/Ram models, including: Grand Voyager engines Wrangler engines Cherokee engines Jeep TJ, XJ, KJ, WJ engines Dodge engines Ram C/V engines (2012–2015) Chrysler engines OEM replacement numbers this cap matches: 55111074AA, 55111074AB, 55038011AB, 55116874AE, 52079331, 54201 Important: Please doublecheck your vehicle's OEM part number against the list above before ordering to confirm fit. Practical use scenarios Routine maintenance: a worn or cracked radiator/coolant cap during scheduled coolant changes or as part of a prewinter inspection to maintain proper pressure and avoid leaks. After repairs: Reinstall a correct, sealed cap following coolingsystem repairs (thermostat, hoses, radiator) to ensure the system holds pressure and prevents coolant loss. Offroad or long trips: Use when driving on rough roads or towing to reduce the risk of coolant spillage from sudden vehicle motion and to keep the cooling system operating safely. What to expect A directfit replacement cap that restores a secure seal and visibility. Long service life due to robust, temperatureresistant materials. Clear 3D markings that make routine checks faster and reduce fluid mixup risk. Ordering note Confirm your vehicle's OEM part number matches one of the numbers listed (55111074AA, 55111074AB, 55038011AB, 55116874AE, 52079331, 54201) before .