BMW 3-Series Radiator Caps
- ACDelco®Professional™ Engine Coolant Radiator Cap (12R7S)Professional™ Engine Coolant Radiator Cap by ACDelco®. Pressure: 16 psi. Material: Stainless Steel. With a full range of part numbers to fit most GM vehicles, ACDelco Professional™ Radiator Caps offer customers an ideal replacement...Lets you release the pressure prior to taking off the capDesigned to be OE-like$5.50
- Mr. Gasket®Thermocap™ Black Engine Coolant Radiator Cap (2476BK)Thermocap™ Black Engine Coolant Radiator Cap (2476BK) by Mr. Gasket®. Pressure: 16 psi. Material: Aluminum. Finish: Black Anodized. Knowing your coolant temperature can help to prevent burn injuries. Thermo Cap, with its built-in...$44.95
- Mr. Gasket®Thermocap™ Blue Engine Coolant Radiator Cap (2471B)Thermocap™ Blue Engine Coolant Radiator Cap (2471B) by Mr. Gasket®. Pressure: 16 psi. Material: Aluminum. Finish: Blue Anodized. Knowing your coolant temperature can help to prevent burn injuries. Thermo Cap, with its built-in...$44.95
- Mr. Gasket®Thermocap™ Red Engine Coolant Radiator Cap (2471R)Thermocap™ Red Engine Coolant Radiator Cap (2471R) by Mr. Gasket®. Pressure: 16 psi. Material: Aluminum. Finish: Red Anodized. Knowing your coolant temperature can help to prevent burn injuries. Thermo Cap, with its built-in...$54.95
- Mr. Gasket®Thermocap™ Silver Engine Coolant Radiator Cap (2471S)Thermocap™ Silver Engine Coolant Radiator Cap (2471S) by Mr. Gasket®. Pressure: 16 psi. Material: Aluminum. Finish: Silver Anodized. Knowing your coolant temperature can help to prevent burn injuries. Thermo Cap, with its built-in...$44.95
- Behr®Engine Coolant Expansion Tank Cap (CRB 22 000P)Engine Coolant Expansion Tank Cap (CRB 22 000P) by Behr®. Pressure: 2.0 bar. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly...Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating$11.49
- Meistersatz®Engine Coolant Expansion Tank Cap (17-11-4-379-047 FE)Engine Coolant Expansion Tank Cap (17-11-4-379-047 FE) by Meistersatz®. Pressure: 1.2 bar. This product is a budget-friendly replacement solution for your vehicle maintenance that is made to strict OE standards. It is manufactured from...Made to meet original equipment standardsBuilt to provide OE fit and function$9.36
- Reutter®Engine Coolant Reservoir Cap (CPE0050)Engine Coolant Reservoir Cap (CPE0050) by Reutter®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient replacement product...Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating$10.38
- Reutter®Engine Coolant Reservoir Cap (17-11-1-742-232)Engine Coolant Reservoir Cap (17-11-1-742-232) by Reutter®. Pressure: 1.4 bar. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly...Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating$14.06
- Reutter®Engine Coolant Reservoir Cap (17114379047-FE)Engine Coolant Reservoir Cap (17114379047-FE) by Reutter®. Pressure: 1.2 bar. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly...Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating$16.31
- TruParts®OE Type Engine Coolant Reservoir Cap (TRP290342)OE Type Engine Coolant Reservoir Cap (TRP290342) by TruParts®. Pressure: 29 lb. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$11.49
- TruParts®OE Type Engine Coolant Reservoir Cap (TRP290349)OE Type Engine Coolant Reservoir Cap (TRP290349) by TruParts®. Pressure: 20 lb. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$7.99
- TruParts®Safety Lever Engine Coolant Reservoir Cap (TRP290347)Safety Lever Engine Coolant Reservoir Cap (TRP290347) by TruParts®. Pressure: 16 lb. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$3.74
- TruParts®Standard Engine Coolant Reservoir Cap (TRP496522)Standard Engine Coolant Reservoir Cap (TRP496522) by TruParts®. Pressure: 30 lb. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$12.13
- TruParts®Standard Engine Coolant Reservoir Cap (TRP290348)Standard Engine Coolant Reservoir Cap (TRP290348) by TruParts®. Pressure: 16 lb. Go with this high-quality product to restore your vehicle’s lost power and bring it back to its optimal condition. Made from the finest materials in...Made utilizing the finest materials and equipmentEngineered to restore your vehicle to its pristine condition$2.50
- Koyorad®Hyper Series Blue Radiator Cap (SK-D13)Hyper Series Blue Radiator Cap (SK-D13) by Koyorad®. Finish: Blue. Extract every ounce of cooling efficiency from Koyorad all-aluminum performance radiators with a genuine Koyorad Hyper Cap! This Koyorad Hyper Cap withstands an...Increased valve pressure ratingHigh-quality components$40.05
- Koyorad®Hyper Series Red Radiator Cap (SK-C13)Hyper Series Red Radiator Cap (SK-C13) by Koyorad®. Finish: Red. Extract every ounce of cooling efficiency from Koyorad all-aluminum performance radiators with a genuine Koyorad Hyper Cap! This Koyorad Hyper Cap withstands an increased...Increased valve pressure ratingHigh-quality components$40.05
- BMW OEEngine Coolant Reservoir Cap (17135A1BD89)Engine Coolant Reservoir Cap (17135A1BD89) by BMW OE. Choose genuine OE parts to restore the distinctive appearance and performance of your BMW. Meticulously crafted with German ingenuity, innovation, and attention to detail, each part...OE part manufactured to provide authentic quality, look, and functionDesigned to easily restore your BMW’s original condition$19.24
- BMW OEEngine Coolant Reservoir Cap (17117639022)Engine Coolant Reservoir Cap (17117639022) by BMW OE. Choose genuine OE parts to restore the distinctive appearance and performance of your BMW. Meticulously crafted with German ingenuity, innovation, and attention to detail, each part...OE part manufactured to provide authentic quality, look, and functionDesigned to easily restore your BMW’s original condition$27.59
- Genuine®Engine Coolant Expansion Tank Cap (17-13-8-665-638)Engine Coolant Expansion Tank Cap by Genuine®. If your engine cooling system is in need of repair, don’t compromise the performance and safety of your car with suspect, off-brand replacement parts from the local auto parts chain...Designed to restore your vehicle’s engine cooling systemGenuine OE replacement parts from the OE manufacturer$29.67
While operating, the engine produces a great amount of heat which can be destructive for the engine itself and other underhood components. For this reason, vehicles are equipped with radiators that help to cool the engine down. Engine coolant found inside the radiator should operate under the required amount of pressure. It is the task of a radiator cap to act as a pressure valve. Another function of a radiator cap is to direct some hot coolant to the overflow reservoir and once the acceptable levels of pressure have been reached, to draw it back, thus preventing extra pressure buildup in the system.
The BMW 3-Series manufactured in the 80s had problems with excessive pressure in the cooling system. The pressure was so intense that it could damage the heater core and let hot coolant in the cabin, splashing it right on the driver's feet. A different radiator cap and pressure relief valve solved the problem in recalled vehicles. Coolant leak (a problem area fairly common for 3ers) is the first sign of a failing radiator cap. To make sure that it is the cap’s failure, check the pressure inside the radiator – if it is different from normal, get ready to replace the cap. Here you can find top-notch BMW 3-Series replacement radiator caps to restore the cooling system.