

Subaru Radiator Cap Assembly 45137AE003 OEM | Crosstrek, Forester, Impreza, Legacy, Outback, WRX, STi
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Description
xOverview
The Subaru radiator cap assembly, OEM part number 45137AE003, is designed to meet Subaru’s exacting standards. This genuine component fits a wide range of popular models and supports the cooling system’s pressure balance as the engine warms and cools. By pairing with the correct reservoir cap, it helps maintain a reliable seal around the radiator neck, reducing the risk of leaks and helping keep coolant levels steady over time.
Key benefits of using the OEM cap
- Genuine Subaru Part Number: 45137AE003
- Exact fit across multiple models: Crosstrek, Forester, Impreza, Legacy, Outback, STi, and WRX
- OEM-grade materials and construction for durable, long-lasting performance
- Engineered to seal properly with Subaru cooling system components
- Simple replacement to restore original cooling system behavior
Model compatibility
- Crosstrek: 2013–2025
- Forester: 1999–2025
- Impreza: 1999–2025
- Legacy: 2020–2025
- Outback: 2020–2025
- STi: 2015–2021
- WRX: 2015–2025
Real-world use scenarios
For daily commutes, road trips, or seasonal maintenance, this OEM cap supports consistent pressure management within the cooling system. The correct seal helps minimize coolant loss from small leaks and contributes to stable engine temperatures as you drive through varying weather and road conditions. Think of it as a small, quiet part that plays a supporting role in your Subaru’s cooling efficiency.
Installation and care
Replacing with the OEM cap is straightforward with standard hand tools. Before replacement, confirm your vehicle’s model year and engine configuration to ensure compatibility. If you’re unsure, consult your Subaru service manual or a trusted technician for guidance.
FAQ
Q: Which Subaru models is the 45137AE003 radiator cap compatible with?
A: Crosstrek 2013–2025, Forester 1999–2025, Impreza 1999–2025, Legacy 2020–2025, Outback 2020–2025, STi 2015–2021, and WRX 2015–2025.
Q: Why choose an OEM Subaru radiator cap?
A: It’s the genuine 45137AE003 part, designed for precise fit and reliable sealing in the cooling system.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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