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Radiator Caps

A bad radiator cap may cause a bunch of problems in your engine, including overheating, so you need to replace it as soon as possible. Good thing you can get a high-quality replacement radiator cap right here at CarParts.com. Our radiator caps are manufactured by leading names in the aftermarket industry so you can be sure of their durability and quality. Shop for a new radiator cap now and enjoy our fast shipping and round-the-clock customer service, too.
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Radiator Cap, (E30/E31/E32/E34/E36/Z3 E36/Z8 E52 Chassis)
Part Number: REPB161801
Vehicle Info Required to Guarantee Fit
$2.49
Product Details
Notes : Attaches to Expansion/Overflow Tank; Threaded filler neckRecommended Use : OE ReplacementMaximum Pressure : 30 lbs.Material : PlasticShape : RoundColor Finish : BlackProduct Fit : Direct FitQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Warranty : 1-year Replacement unlimited-mileage warrantyReplaces OE Number : 17117639022, 17111468076Returns Policy : 60-Day Return PolicyInterchange Part Number : 10247, 31332, 17117639022, 17111468076
Radiator Cap - Round, 22 lbs., Blue, Plastic, Sold individually
Part Number: REPA162001
Vehicle Info Required to Guarantee Fit
$6.49
Product Details
Notes : Threaded filler neckRecommended Use : OE ReplacementMaximum Pressure : 22 lbs.Material : PlasticShape : RoundColor Finish : BlueProduct Fit : Direct FitQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Phthalates, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Warranty : 1-year Replacement unlimited-mileage warrantyReplaces OE Number : 1J0121321BReturns Policy : 60-Day Return PolicyInterchange Part Number : 10249, 1J0121321B
Cooling System Service Kit, includes Coolant Reservoir, Fan Clutch, Radiator Cap, Radiator Fan Blade, Thermostat Housing, and Water Pump
Part Number: KIT-081017-31
Vehicle Info Required to Guarantee Fit
$143.99
Vehicle Fitment
  • 2001 - 2006 BMW X5 3.0i 6 Cyl 3.0L
  • 2001 - 2006 BMW 325Ci Base 6 Cyl 2.5L
  • 2001 - 2005 BMW 330i Base 6 Cyl 3.0L
  • 1999 - 2000 BMW 323i Base 6 Cyl 2.5L
  • 2001 - 2005 BMW 325i Base 6 Cyl 2.5L
  • 2001 - 2006 BMW 330Ci Base 6 Cyl 3.0L
  • 2005 BMW 330Ci M 6 Cyl 3.0L
  • 1999 - 2000 BMW 328i Base 6 Cyl 2.8L
  • 2001 - 2005 BMW 330xi Base 6 Cyl 3.0L
  • 2001 - 2005 BMW 325xi Base 6 Cyl 2.5L
  • 2000 BMW 328Ci Base 6 Cyl 2.8L
  • 2000 BMW 323Ci Base 6 Cyl 2.5L
  • 2005 BMW 330i M 6 Cyl 3.0L
Product Details
Components : (1) Coolant Reservoir, (1) Fan Clutch, (1) Radiator Cap, (1) Radiator Fan Blade, (1) Thermostat Housing, and (1) Water PumpWarranty : 1-year DriveMotive unlimited-mileage warrantyQuantity Sold : KitInterchange Part Number : 17137787039, 17117573781, BM3014102, 11521712058, BM3112100, 11527505302, 2691, 10247, 31332, 17117639022, 17111468076, 1430825, 1152090, AW9261, 41057Replaces Partslink Number : BM3014102, BM3112100Replaces OE Number : 17117573781, 11521712058, 11527505302, 17117639022, 17111468076Returns Policy : 60-Day Return PolicyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Radiator Kit, 2.5L/2.8L/3.0L Engines, Aluminum Core, Plastic Tank, includes Coolant Reservoir, Radiator Cap, Radiator Hoses, and Thermostat
Part Number: KIT-052623-34
Vehicle Info Required to Guarantee Fit
$224.99
Product Details
Notes : Radiator Hose - With Quick Connect Fitting; Thermostat - Includes housing; Plastic housing; Blade type; 2-prong male terminal; Coolant Reservoir - Without cap; Radiator Cap - Attaches to Expansion/Overflow Tank; Threaded filler neckCore Dimensions : 22.81 x 17.63 x 1.25 in. Core SizeAutomatic Transmission Cooler : Without Transmission CoolerEngine Oil Cooler : Without Engine Oil CoolerInlet Size : 1.5 in. InletOutlet Location : Bottom right outletComponents : (1) Coolant Reservoir, (1) Radiator, (1) Radiator Cap, (2) Radiator Hose, and (1) ThermostatRecommended Use : OE ReplacementNumberof Rows : 1-Row CoreTank Material : Plastic TankCore Material : Aluminum CoreColor Finish : Factory FinishOutlet Size : 1.5 in. OutletInlet Location : Top left inletReplaces DPI Number : DPI# 2636Product Fit : Direct FitQuantity Sold : KitReplaces OE Number : 17119071519, 17117573781, 17117639022, 17111468076, 17127510952, 11531436408Replaces Partslink Number : BM3010107, BM3014102Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : CoolingPromo Details : Get summer-exclusive savings on all cooling parts & accessories. Click here for more details.Returns Policy : 60-Day Return PolicyCore Height : 22 3/4 in.Core Width : 17 5/8 in.Core Thickness : 1 1/4 in.Interchange Part Number : 3709, CU2636, 17119071519, BM3010107, 17137787039, 17117573781, BM3014102, 10247, 31332, 17117639022, 17111468076, 23404, 72702, 17127510952, 23405, 72703, 11531436408, 1430825
Radiator Kit, 2.0L Engine, Aluminum Core, Plastic Tank, includes Radiator Cap
Part Number: KIT-020117-41
Vehicle Info Required to Guarantee Fit
$100.49
Product Details
Core Dimensions : 25.5 x 17.25 x 1.25 in. Core SizeAutomatic Transmission Cooler : Without Transmission CoolerEngine Oil Cooler : Without Engine Oil CoolerInlet Size : 1.25 in. InletOutlet Location : Bottom right outletComponents : (1) Radiator and (1) Radiator CapRecommended Use : OE ReplacementNumberof Rows : 1-Row CoreTank Material : Plastic TankCore Material : Aluminum CoreColor Finish : Factory FinishOutlet Size : 1.25 in. OutletInlet Location : Top left inletReplaces DPI Number : DPI# 2822Product Fit : Direct FitQuantity Sold : KitReplaces OE Number : 1K0121251AB, 1J0121321BReplaces Partslink Number : VW3010149Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 60-Day Return PolicyCore Height : 25 1/2 in.Core Width : 17 1/4 in.Core Thickness : 1 1/4 in.Interchange Part Number : 3159, CU2822, 1K0121251AB, VW3010149, 10249, 1J0121321B
Radiator Kit, 2.0L Engine, Aluminum Core, Plastic Tank, includes Cooling Fan Assembly and Radiator Cap
Part Number: KIT-060817-50
Vehicle Info Required to Guarantee Fit
$285.99
Product Details
Core Dimensions : 28.38 x 18.44 x 1 in. Core SizeAutomatic Transmission Cooler : With Transmission CoolerEngine Oil Cooler : Without Engine Oil CoolerInlet Size : 1.25 in. InletComponents : (1) Radiator, (1) Radiator Cap, and (1) Radiator FanRecommended Use : OE ReplacementNumberof Rows : 1-Row CoreTank Material : Plastic TankCore Material : Aluminum CoreColor Finish : Factory FinishOutlet Size : 1.25 in. OutletReplaces DPI Number : DPI# 13188Product Fit : Direct FitQuantity Sold : KitReplaces OE Number : 8K0121251T, 8K0121207A-PFM, 1J0121321BReplaces Partslink Number : AU3010145, AU3115113Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Promotions : CoolingPromo Details : Get summer-exclusive savings on all cooling parts & accessories. Click here for more details.Returns Policy : 60-Day Return PolicyCore Height : 28 3/8 in.Core Width : 18 3/8 in.Core Thickness : 1 in.Interchange Part Number : 3518, CU13188, 8K0121251T, AU3010145, 620839, 8K0121207A-PFM, AU3115113, 10249, 1J0121321B
Radiator Fan - Includes Radiator, Radiator Cap, Radiator Fan, Radiator Support, and Radiator Support Cover
Part Number: KIT-060817-21
Vehicle Info Required to Guarantee Fit
$450.99
Vehicle Fitment
  • 2009 - 2012 Audi A4 Quattro Base 4 Cyl 2.0L
  • 2009 - 2012 Audi A4 Quattro Avant 4 Cyl 2.0L
  • 2009 - 2012 Audi A4 Base 4 Cyl 2.0L
Product Details
Notes : Cooling Fan Assembly - Does not include module; Radiator Cap - Threaded filler neck; Radiator Support Cover - Grille upper coverComponents : (1) Radiator, (1) Radiator Cap, (1) Radiator Fan, (1) Radiator Support, and (1) Radiator Support CoverType : Radiator FanDesign : Dual fanRecommended Use : OE ReplacementQuantity Sold : KitReplaces OE Number : 8K0121207A-PFM, 8K0121251T, 1J0121321B, 8K0805594L, 8K0807081Replaces Partslink Number : AU3115113, AU3010145, AU1225124, AU1224102Interchange Part Number : 620839, 8K0121207A-PFM, AU3115113, 3518, CU13188, 8K0121251T, AU3010145, 10249, 1J0121321B, 8K0805594L, AU1225124, 8K0807081, AU1224102Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 60-Day Return Policy
Radiator Kit, 3.0L/3.2L/3.6L/4.2L/4.5L/4.8L/5.0L Engines, Aluminum Core, Plastic Tank, includes Radiator Cap
Part Number: KIT-021417-27
Vehicle Info Required to Guarantee Fit
$139.49
Product Details
Core Dimensions : 27.94 x 21.56 x 1.56 in. Core SizeAutomatic Transmission Cooler : Without Transmission CoolerEngine Oil Cooler : Without Engine Oil CoolerInlet Size : 1.5 in. InletOutlet Location : Bottom right outletComponents : (1) Radiator and (1) Radiator CapRecommended Use : OE ReplacementNumberof Rows : 2-Row CoreTank Material : Plastic TankCore Material : Aluminum CoreColor Finish : Factory FinishOutlet Size : 1.5 in. OutletInlet Location : Top left inletReplaces DPI Number : DPI# 2756Product Fit : Direct FitQuantity Sold : KitReplaces OE Number : 7L0121253A, 1J0121321BReplaces Partslink Number : VW3010146Warranty : 1-year Replacement unlimited-mileage warrantyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Returns Policy : 60-Day Return PolicyCore Height : 28 in.Core Width : 21 1/2 in.Core Thickness : 1 5/8 in.Interchange Part Number : 3554, CU2756, 7L0121253A, VW3010146, 10249, 1J0121321B
31412 Radiator Cap
Part Number: GAT31412
Vehicle Info Required to Guarantee Fit
$13.99
10242 Radiator Cap - Round, 16 lbs., Polished, Steel, Sold individually
Part Number: ST10242
Vehicle Info Required to Guarantee Fit
$20.99
Product Details
Recommended Use : OE ReplacementMaximum Pressure : 16 lbs.Material : SteelShape : RoundColor Finish : PolishedProduct Fit : Direct FitInside Diameter : 1.25 in.Filler Neck Depth : 0.38 in.Quantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Warranty : 90-day Stant limited warranty
31336 Radiator Cap
Part Number: GAT31336
Vehicle Info Required to Guarantee Fit
$13.99
31528 Radiator Cap
Part Number: GAT31528
Vehicle Info Required to Guarantee Fit
$9.99
31523 Radiator Cap
Part Number: GAT31523
Vehicle Info Required to Guarantee Fit
$9.49
RC85 Radiator Cap - Round, 15 lbs., Black, Plastic, Sold individually
Part Number: ACRC85
Vehicle Info Required to Guarantee Fit
$15.99
Product Details
Notes : 15 psi radiator capRecommended Use : OE ReplacementMaximum Pressure : 15 lbs.Material : PlasticShape : RoundColor Finish : BlackProduct Fit : Direct FitSeries : GM Original Equipment SeriesQuantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Warranty : 24-months or unlimited mile AC Delco limited warrantyReplaces OE Number : 15042975
31333 Radiator Cap - Round, 13 lbs., Polished, Steel, Sold individually
Part Number: GAT31333
Vehicle Info Required to Guarantee Fit
$12.49
Product Details
Recommended Use : OE ReplacementMaximum Pressure : 13 lbs.Material : SteelShape : RoundColor Finish : PolishedProduct Fit : Direct FitFiller Neck Depth : 0.63 in.Quantity Sold : Sold individuallyProp 65 Warning :

Warning SymbolWARNING: This product can expose you to chemical which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Warranty : Lifetime Gates limited warranty
Page 1 of 12 | Showing 1 - 15 of 169 results

Top Rated Products

Gates 31412 Radiator Cap
$13.99( Review)
Had a overheating problem and come to find out, it was an easy fix. Radiator cap was See More
Audrey B.
VERIFIED PURCHASER
Not sure how to review a radiator cap! Item exactly as described and arrived a day eaSee More
Elizabeth O.
VERIFIED PURCHASER

Product Questions & Answers

Q:2003 Chev Astro van the radiator cap will not come off I turn and lift feels like it is stuck???. been losing fluid real slow any ideas.?? Show Less
Terry B.
A:BEST ANSWERHello! You may have to press down and rotate to remove it. You can also try some penetrating lubricant to help free up the cap. Show less
Mitchell D.
 
2 Questions, 1 AnswerView all Q&As >

Shopping for Radiator Cap

Radiator Cap Shopping Info

What Is a Radiator Cap?

The radiator cap not only seals the radiator, it also maintains the pressure inside the radiator at a certain range (typically around 16 PSI). Depending on the radiator cap type, the radiator cap is also responsible for allowing excess coolant or gas to escape.

How Much Does a Replacement Radiator Cap Cost?

Most radiator caps typically cost around $10 to $30. Several factors affect pricing, such as the brand, radiator cap type, and its PSI rating.

Shop for Aftermarket Radiator Caps at CarParts.com!

Don’t let a faulty radiator cap cause problems in your vehicle’s cooling system. Restore your cooling system with radiator caps from CarParts.com!

Our radiator caps are built with the best materials, so they can withstand the high temperature and pressure it’s supposed to work in throughout its lifetime. We offer different kinds of radiator caps, including recovery caps, non-recovery caps, and locking caps.

Our radiator caps have passed stringent quality control processes so you can be confident that they can last for a long time without leaking. The springs inside our recovery and non-recovery caps are sure to regulate the coolant pressure inside your radiator at the specified pressure.

In just a few clicks, you can shop for a radiator cap sourced from the best brands. You can easily find the right radiator cap for your vehicle through our vehicle selector. Simply enter your vehicle’s year, model, and make in their corresponding fields and we’ll show you a list of compatible radiator caps to choose from!

You can get the best deals on radiator caps because our parts are competitively priced. Experience our fast shipping made possible by our strategically located warehouses. Shop for a radiator cap today and we’ll ship it straight to your doorstep in as fast as two business days!