MotoRad T-37 Radiator Cap — Direct-Fit Replacement, OEM Pressure Match for Honda & Toyota (Fits Accord/Civic/CR-V)

The MotoRad T-37 (part number T37) is a replacement radiator cap designed to fit a broad list of domestic and import vehicles. It replaces OEM numbers 96068657, 19045PY3013, MR597126, 45137AJ000 and 164016A140 and is commonly used where factory caps have failed, leaked or lost proper pressure control. This description explains what the cap does, how it fits, and what to check before purchasing so you get the correct part for your cooling system.

What does this radiator cap do for my cooling system?

The radiator cap helps maintain the correct pressure in the cooling system so coolant circulates effectively and boiling points are raised to protect the engine under load. It seals the filler neck and uses a spring-loaded valve to release excess pressure to the overflow tank and allow vacuum flow back in as the engine cools. Replacing a damaged or worn cap restores the intended pressure characteristics of the original design.

• Maintains factory-specified pressure for proper coolant boiling point.
• Provides a positive seal to prevent coolant loss and air entry.
• Includes spring-and-valve assembly that vents excess pressure safely.
• Directly replaces listed OEM part numbers for correct fit and function.

How do I confirm fitment with my vehicle?

Fitment is determined by matching the OEM part number and verifying the radiator neck style on your vehicle. Use the listed compatible makes and years as a guide, but always cross-check with the OEM number or an online vehicle parts lookup before ordering. If your vehicle manual or dealer lists any of the replaced part numbers, this cap will be suitable.

• Compare your original cap’s part number to the OEM numbers listed.
• Check the filler neck style and dimensions against your current cap.
• Use retailer fitment tools (e.g., Amazon Confirmed Fit) or VIN lookup for accuracy.
• Contact the seller with your vehicle year/make/model if unsure.

What are the most common vehicles this cap fits?

The MotoRad T-37 covers many Honda and Toyota models across multiple years and also fits various Lexus, Acura, Subaru, Mitsubishi, Suzuki and other makes listed. It’s ideal for owners of Civics, Accords, Camrys, Tacomas, CR-Vs, Pilots, and many Lexus models where the factory used the same pressure-rated cap. See the detailed compatibility list to confirm whether your specific model and year are included.

• Honda: Accord, Civic, CR-V, Pilot, Odyssey, Fit, HR-V, S2000 and others.
• Toyota/Lexus: Camry, Tacoma, 4Runner, Tundra, Avalon, RAV4, many Lexus series.
• Also used in select Acura, Subaru, Mitsubishi, Suzuki, Scion, Mazda and more.
• Replaces OEM numbers 96068657, 19045PY3013, MR597126, 45137AJ000, 164016A140.

How should I install and inspect the replacement cap?

Installation is straightforward: install when the engine is cool, align the cap to the filler neck and twist until it locks. Inspect the seal and spring action: the cap should lock tightly and release at its rated pressure. After installation, monitor the coolant level and check for leaks during the next few heat cycles to ensure correct operation.

• Install only when engine and coolant are cool to avoid burns.
• Ensure the rubber seal is clean and seated before twisting into place.
• Observe for leaks and check coolant expansion behavior over a few drives.
• Replace immediately if the cap fails to hold pressure or vents improperly.

Who is this for: The MotoRad T-37 is aimed at DIY mechanics, independent repair shops and vehicle owners who need a cost-effective, OEM-equivalent radiator cap for Honda, Toyota, Lexus and many other compatible models. Choose this cap if your original cap matches one of the listed part numbers or if a vehicle fitment lookup confirms compatibility. If in doubt, compare part numbers or consult a trusted mechanic to ensure the cap meets your vehicle’s pressure specification and filler neck style.