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Subaru Radiators

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Common Issues You Shouldn't Ignore to Save Your Radiator

Your radiator is the heart of your Subaru’s cooling system, preventing overheating and engine damage during daily drives and long road trips. Ignoring early warning signs of trouble can lead to costly repairs—or even total engine failure. For Subaru Impreza owners, catching radiator problems early can extend your vehicle’s life and save you hundreds in future repairs.

How Does the Radiator in Your Subaru Work?

The radiator dissipates heat from the coolant that circulates through your engine, using air passing through its fins to cool the fluid before it returns to the engine block. This constant loop regulates engine temperature, especially under load or during summer drives, and prevents overheating in your Subaru Impreza.

Minor Radiator Problems That Need Special Attention

1. Small Coolant Leak

Even a slow drip can lower coolant levels and lead to overheating over time.

2. Cracked Radiator Hoses

Dry or brittle hoses can rupture suddenly under pressure, spilling coolant rapidly.

3. Rust or Corrosion on the Radiator

Discoloration on the fins or seams could indicate internal decay and weakening.

4. Air Pockets in the Cooling System

Trapped air prevents proper coolant circulation, causing uneven engine temperatures.

5. Weak Radiator Cap Seal

A faulty cap may reduce pressure and allow coolant to boil at a lower temperature.

During radiator service, it's smart to inspect belts and hoses as they directly support coolant flow and engine cooling. Contact us today to order genuine Subaru radiator parts and accessories at exclusive prices.

Drain Plug O-Ring

Part Number: 45192AN00A
Subaru Subaru
Notes: Included with radiator assembly.
Other Names: Radiator Assembly O-Ring, Pack Drain
Description: 2.5L. 2.4L turbo.
Fits:
  • Subaru:
    • Legacy,
    • Outback
MSRP $4.32
$3.32

Side Panel

Part Number: 53010SA0209P
Subaru Subaru
Notes: Included with radiator support.
Other Names: Panel CP Radiator Side Left-hand
Fits:
  • Subaru:
    • Forester
MSRP $82.95
$57.73

Side Panel

Part Number: 53029FL1309P
Subaru Subaru
Notes: Included with radiator support.
Other Names: Panel Complete Radiator Side Right-hand
Description: Without hybrid.
Fits:
  • Subaru:
    • Crosstrek
MSRP $74.17
$51.62

Upper Panel

Part Number: 53060AL06A9P
Subaru Subaru
Notes: Included with side panel.
Other Names: Panel Complete Radiator Side Right-hand
Fits:
  • Subaru:
    • Legacy,
    • Outback
MSRP $92.53
$63.85

AC & Heater Assembly

Part Number: 8705042C30
Subaru Subaru
Other Names: Case Assembly, Radiator Assembly Air C
Description: Solterra.
Fits:
  • Subaru:
    • Solterra
MSRP $2,339.78
$1,586.37

Fan & Motor

Part Number: 45121AG000
Subaru Subaru
Applications: 2.5L.
Other Names: Fan Blade, Fan & Motor Ay Radiator
Description: Forester. Impreza. Legacy. With turbo.
Fits:
  • Subaru:
    • Forester,
    • Impreza,
    • Legacy
MSRP $221.47
$152.81

Engine Coolant Reservoir

Part Number: 45150AE000
Subaru Subaru
Other Names: Reservoir Assembly, Reserve Tank Ay Radiator
Description: 2.5L.
Fits:
  • Subaru:
    • Impreza
MSRP $83.15
$57.87

Reservoir Assembly

Part Number: 45150VA020
Subaru Subaru
Notes: Includes Expansion Tank Cap.
Applications: 2.5L.
Other Names: Expansion Tank, Reserve Tank Ay Radiator
Description: 2.5L. WRX STI.
Fits:
  • Subaru:
    • WRX STI
MSRP $64.78
$45.09

Engine Coolant Reservoir Hose Adapter

Part Number: 45128SA010
Subaru Subaru
Notes: Included with reservoir assembly.
Other Names: Hose Connector, Connector Over Flow Radiator
Description: 2.5L turbo, 2006-08.
Fits:
  • Subaru:
    • Forester
MSRP $15.67
$12.03

Engine Coolant Reservoir

Part Number: 45150FE000
Subaru Subaru
Notes: Order by description.
Other Names: Reservoir Assembly, Reserve Tank Ay Radiator
Description: 2.5L turbo.
Fits:
  • Subaru:
    • Baja
MSRP $83.15
$57.87

Inlet Hose

Part Number: 45161aj020
Subaru Subaru
Applications: 3.6L.
Other Names: Upper Hose, Radiator Hose Inlet B
Replaces: 45161AJ02A
Description: Sedan. 3.6L, Legacy.
Fits:
  • Subaru:
    • Legacy
MSRP $25.95
$19.93

Drain Plug

Part Number: 45191AN00A
Subaru Subaru
Notes: Included with radiator assembly.
Other Names: Radiator Assembly Drain Plug, Cock Drain
Description: 2.5L. 2.4L turbo.
Fits:
  • Subaru:
    • Legacy,
    • Outback
MSRP $6.25
$4.80

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