How to Remove the Diverter Valve on a Subaru Legacy?

On 2006 and later Forester models, first remove the air bypass valve mounting bolts, lift the valve, disconnect the vacuum hose and inlet duct, and then remove the valve. For 2005 and later Legacy and Outback models, disconnect the vacuum hose and air bypass hose, remove the valve's mounting bolts, and then the valve. Installation is the reverse of removal.

Genuine Subaru Legacy Diverter Valve

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4 Diverter Valves found

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Subaru Legacy Valve Assembly-Air Bypass
Part Number: 14471AA230
$90.26 MSRP: $130.82
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Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2012 Subaru Legacy | 2.5GT Limited, 2.5GT Premium | 2.5L H4 Turbo
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Subaru Legacy Valve Assembly Air Bypass
Part Number: 14471AA130
$101.34 MSRP: $146.87
You Save: $45.53 (31%)
Product Specifications
- Other Name: Valve Assembly-Air Bypass; By-Pass Valve
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005-2009 Subaru Legacy | GT, GT Limited, XT Limited | 2.5L H4 Turbo
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Subaru Legacy Air Bypass Valve
Part Number: 14471AA001
$95.78 MSRP: $138.82
You Save: $43.04 (31%)
Product Specifications
- Other Name: Valve Assembly-Air Bypass; By-Pass Valve
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1991-1994 Subaru Legacy | Turbo
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Subaru Legacy Valve Assembly Air Bypass
Part Number: 14471AA160
$203.90 MSRP: $298.10
You Save: $94.20 (32%)
Product Specifications
- Other Name: Valve Assembly-Air Bypass
- Replaced by: 14471AA1609L
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004 Subaru Legacy | Baja-B | 2.5L H4 Turbo

Subaru Legacy Diverter Valve

Subaru Legacy Diverter Valve redirects the pressurized flow to the intake whenever the operating condition changes to protect performance and emissions components. The Diverter Valve in the secondary air injection system directs the output of the air pump harmlessly away from the exhaust during deceleration so that damaging backfires cannot occur. During cold starting, it will direct air to the exhaust ports, and once warm, it will divert air to the catalytic converter to speed sensor readiness and reduce hydrocarbons and carbon monoxide. Turbocharged editions of the Subaru Legacy are fitted with a Diverter Valve. The task of the Diverter Valve is to capture leftover boost when the throttle snaps shut. The Diverter Valve captures the leftover boost and feeds it back to the compressor inlet. As a result, the turbo continues to spin and reverse flow from the engine is prevented. A blow-off valve does a similar job; however, it vents to open air. As such, the Subaru configuration maintains stable air-fuel ratios and quieter operation which promotes fuel economy. Each modern Legacy model has a vacuum actuated Diverter Valve. While the installation location varies depending upon the plumbing of emissions versus turbo, the purpose remains the same. Rapid bypassing occurs on all Subarus.

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Subaru Legacy Diverter Valve Parts Questions & Experts Answers

Valve Assembly Air Bypass
14471AA130
Q:
How to Remove the Diverter Valve on a Subaru Legacy?
Posted by Billy C.
A:
On 2006 and later Forester models, first remove the air bypass valve mounting bolts, lift the valve, disconnect the vacuum hose and inlet duct, and then remove the valve. For 2005 and later Legacy and Outback models, disconnect the vacuum hose and air bypass hose, remove the valve's mounting bolts, and then the valve. Installation is the reverse of removal.
Answered by Subaru Parts Specialist Jesse / Apr 23, 2024