• Subaru 45137AE012 Genuine Radiator Cap Assembly
1 4

Subaru

Subaru 45137AE012 Genuine Radiator Cap Assembly

Subaru 45137AE012 Genuine Radiator Cap Assembly

$24.00
Shipping cost is calculated at checkout. Enter the address to find out the delivery time and cost.

✔ Subaru 45137AE012 Radiator Cap Assembly — Genuine OEM Part
✔ Fitment: 2015–2025 Subaru Ascent (2.4L), Legacy (2.5L / 3.6L), and Outback (2.5L / 3.6L)
✔ Direct replacement for factory radiator cap — no modifications required
✔ Manufactured to Subaru’s original specifications — 1.1 bar (16 PSI) pressure rating
✔ Genuine OEM quality — maintains proper cooling system pressure and prevents overheating
✔ Replaces 45137AE010, 45137AE011

 

Subaru 45137AE012 Genuine Radiator Cap Assembly — for Ascent, Legacy, and Outback

Coolant leaks from the radiator neck, engine overheating at idle or under load, a low coolant level warning, or steam coming from under the hood — these are common signs that your radiator cap is failing. A worn or stuck cap can cause coolant loss, pressure loss, and overheating, which can lead to severe engine damage. Replacing it with this genuine Subaru radiator cap restores proper cooling system pressure and protects your engine.

This is a factory-original Subaru radiator cap assembly (OE part number 45137AE012), specifically designed for the 2015–2025 Ascent, Legacy, and Outback models. It is engineered with a calibrated pressure relief valve and a vacuum valve to maintain the correct operating pressure in the cooling system. This is the same part sold at Subaru dealerships.

 

When to Replace

• Coolant leaks from the radiator neck or cap area
• Engine overheating at idle or under load
• Low coolant level warning or coolant loss
• Steam or coolant spray from under the hood
• The cap does not hold pressure (can be tested with a pressure tester)
• Damaged or cracked rubber gasket on the cap

Product Details & Highlights

• ✔ Genuine Subaru OEM — not an aftermarket or Chinese replica
• ✔ Calibrated pressure relief valve — opens at the correct pressure
• ✔ High-temperature rubber gasket — ensures a leak-free seal
• ✔ Made from corrosion-resistant materials — for long service life
• ✔ Direct replacement — fits factory radiator neck
• ✔ Backed by Subaru’s manufacturer warranty (valid through any authorized dealer)

Package Contents

• 1 × Subaru 45137AE012 radiator cap assembly (genuine)

FAQ

FAQ

Is this a genuine Subaru part or a copy?
This is 100% genuine Subaru OEM — in original factory packaging with the Subaru part number printed on the label. It is not an aftermarket brand or a replica.

Does this fit my 2021 Subaru Ascent?
Yes — the 2021 Ascent with the 2.4L engine uses this radiator cap. We recommend verifying with your VIN.

Does this fit my 2017 Subaru Outback 3.6R?
Yes — the 2017 Outback 3.6R with the 3.6L engine is listed as compatible. Please verify with your VIN.

What is the pressure rating of this cap?
The pressure rating is 1.1 bar (16 PSI) .

Can I reuse the old cap?
If the cap is in good condition and holds pressure, it can be reused. However, we recommend replacing it if the gasket is damaged or the cap no longer holds pressure.

Does this cap come with a new gasket?
Yes — the gasket is pre-installed on the cap assembly. No separate gasket is required.

Does this fit my 2019 Subaru Legacy 2.5i?
Yes — the 2019 Legacy 2.5i is listed as compatible. Please verify with your VIN.

View full details