How to Remove and Install a Fuel Pressure Regulator in Subaru Forester?

Disconnect the cable from the negative battery terminal to relieve fuel system pressure. For 2000-2004 models, remove the air intake duct, disconnect the vacuum hose and fuel hose from the fuel pressure regulator, remove the regulator mounting screws and old O-ring. Install a new O-ring, lightly coated with clean engine oil, and check for leaks. For 2005 models, disconnect the vacuum hose, fuel hoses, and remove the bolt attaching the regulator mounting bracket to the intake manifold.

Genuine Subaru Forester Fuel Pressure Regulator

Fuel Tank Pressure Regulator

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7 Fuel Pressure Regulators found

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Subaru Forester Fuel Pressure Regulator
Part Number: 22670AA351
$121.01 MSRP: $175.38
You Save: $54.37 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Regulator Assembly-Pressure
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2004-2005 Subaru Forester | XT | 2.5L H4 Turbo
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Subaru Forester Fuel Pressure Regulator
Part Number: 22670AA252
$125.59 MSRP: $182.02
You Save: $56.43 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Regulator Assembly-Pressure
- Replaces: 22670AA251
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006-2008 Subaru Forester | Forester Sports, XT | 2.5L H4 Turbo
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Subaru Forester Fuel Pressure Regulator
Part Number: 22670AA400
$96.16 MSRP: $139.37
You Save: $43.21 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Regulator Assembly-Pressure
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2009-2013 Subaru Forester | XT, XT Limited | 2.5L H4 DOHC Turbo
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Subaru Forester Fuel Pressure Regulator
Part Number: 22670AA251
$125.59 MSRP: $182.02
You Save: $56.43 (31%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: Regulator Assembly-Pressure
- Replaced by: 22670AA252
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006 Subaru Forester | XT | 2.5L H4 Turbo
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Subaru Forester Fuel Pressure Regulator
Part Number: 22670AA390
$88.68 MSRP: $128.52
You Save: $39.84 (31%)
Product Specifications
- Other Name: Regulator Assembly-Pressure
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2005 Subaru Forester | L.L.Bean, X, XS | 2.5L H4
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Subaru Forester Fuel Pressure Regulator
Part Number: 22670AA240
$111.57 MSRP: $161.70
You Save: $50.13 (31%)
Product Specifications
- Other Name: Regulator Assembly-Pressure
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1999-2004 Subaru Forester | Base, L, S, X, XS | 2.5L H4, 2.5L H4 SOHC
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Subaru Forester Fuel Pressure Regulator
Part Number: 22670AA050
Product Specifications
- Other Name: Regulator Assembly-Pressure
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 1998 Subaru Forester | Base, L, S | 2.5L H4 DOHC, 2.5L H4 DOHC (New EVAPO)

Subaru Forester Fuel Pressure Regulator

The Fuel Pressure Regulator on your Subaru Forester regulates your car's fuel pressure to a certain standard to ensure it gets the correct amount of fuel. The Fuel Pressure Regulator connects to the fuel rail and uses a spring-loaded diaphragm with a manifold vacuum port and a connection to the fuel return line that controls the flow back to the tank. The Subaru Forester has a valve that opens to send excess fuel to the return at idle due to the vacuum signal pushing against the spring. However, under throttle, the vacuum reduces and lets the spring restrict return flow so that the pressure can remain high. The Fuel Pressure Regulator continuously equalizes rail pressure through this feedback and behaves as a back-pressure valve. Routine checks of the Subaru Forester Fuel Pressure Regulator involve disconnecting the vacuum hose and observing for a pressure rise. If it sticks closed, rail pressure rises and the mixture becomes rich; opposite, a broken spring or internal leak lowers pressure and creates a lean condition. Through proper functioning, the delivery of fuel remains stable and the original Fuel Pressure Regulator remains suitable for use when the fuel system stays in factory form.

Our website stands as the go-to online destination for OEM Subaru Forester Fuel Pressure Regulator. With complete lines of genuine Subaru Forester Fuel Pressure Regulator available at unbeatable market prices, we ensure top quality, reliability, and durability. Each part comes backed by the manufacturer's warranty, reinforcing your trust in our offerings.

Subaru Forester Fuel Pressure Regulator Parts Questions & Experts Answers

Fuel Pressure Regulator
22670AA240
Q:
How to Remove and Install a Fuel Pressure Regulator in Subaru Forester?
Posted by Hugh D.
A:
Disconnect the cable from the negative battery terminal to relieve fuel system pressure. For 2000-2004 models, remove the air intake duct, disconnect the vacuum hose and fuel hose from the fuel pressure regulator, remove the regulator mounting screws and old O-ring. Install a new O-ring, lightly coated with clean engine oil, and check for leaks. For 2005 models, disconnect the vacuum hose, fuel hoses, and remove the bolt attaching the regulator mounting bracket to the intake manifold.
Answered by Subaru Parts Specialist Gary / Jun 14, 2025

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