Radiator and expansion tank caps
Every Jag has at least one radiator cap, some have two. These get ignored for years, but you should really make radiator cap inspection part of your routine maintenance. Keeping your cooling system under pressure is part of what keeps your car from boiling over, and a radiator cap with a hard or cracked sealing ring won't help much. Mysterious coolant loss? Slight smell of antifreeze when you park? Check the caps!
See our Jaguar Parts Store Catalog to order parts.