Durable material: Manufactured from quality ABS plastic that resists temperature, corrosion, rust, oxidation and deformation. Designed to withstand the heat, humidity and chemical exposure commonly found in engine compartments for longlasting service. Direct replacement: Fits and replaces leaking, disintegrating or broken radiator coolant reservoir caps with OE numbers 19106RNAA48 and 19102PM5A00. for specific coolant reservoirs to ensure a precise fit with the vehicle cooling system. Reliable sealing: Built with quality sealing material to prevent coolant leakage and evaporation. Maintains stable pressure in the cooling system to reduce the risk of engine overheating and protect engine components. Easy installation: Simple swapout — remove the old or damaged cap and install the one. No special tools required, saving time and avoiding a trip to the . Suitable for quick emergency roadside replacement. Performance you can count on: Designed to keep coolant contained under varying road and temperature conditions, helping extend engine life and maintain cooling system efficiency. Compatibility and function Compatible with radiator coolant reservoirs that require caps listed under OE numbers 19106RNAA48 and 19102PM5A00. Function: restores proper sealing and pressure control in the vehicle cooling system by replacing worn or damaged reservoir caps. Typical applications / use scenarios Routine maintenance: an aging or cracked reservoir cap during scheduled coolant system checks to prevent slow leaks and pressure loss. Hotweather or mileage driving: Use when operating in temperature climates or during long trips to ensure the cooling system remains sealed and pressurestable. Emergency roadside : Carry as a replacement to quickly remedy a leaking or damaged cap and avoid overheating until full repairs can be completed. What's included One radiator coolant reservoir cap, compatible with OE 19106RNAA48 and 19102PM5A00. Notes Check vehicle service manual or existing cap for OE number to confirm compatibility before . Installation typically requires only removing the old cap and fitting the one.