How to remove pistons and piston pins on Subaru Legacy?

Temporarily install the crankshaft pulley bolt in the crankshaft front end to enable turning of the crankshaft and check for a wear ridge at the top of each cylinder; if present, it must be machined out before removing the pistons, using a ridge reamer to eliminate the raised material. Remove the plugs from the four service holes with an Allen wrench to access the piston pin cir clips, soaking them with penetrating oil if they are difficult to remove, and ensuring the wrench is fully inserted to avoid rounding off the hexagonal opening. Position the piston at bottom dead center by turning the crankshaft, then use needle-nose pliers through the service holes to remove the cir clips, utilizing a small flashlight to ensure proper alignment. For piston pin removal, a special tool is required to extract the pins through the service hole, which can be fabricated from steel rod; if the pins are varnished, a slide hammer or striking the tool may be necessary. Keep the pistons and pins together, marking the pistons for reinstallation in their original locations. The pistons can remain in the cylinder bores until the crankcase is separated, at which point they can be driven out with a wooden or plastic hammer handle, or they can be removed beforehand by turning the crankshaft slowly until the connecting rods push the pistons out slightly, inserting cleaned and oiled piston pins into the connecting rods through the service holes, and then turning the crankshaft until the pin pushes the piston from the bore before pulling the pistons out.

Genuine Subaru Legacy Piston

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51 Pistons found

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Subaru Legacy Piston Set RH
Part Number: 12013AB250
$79.27 MSRP: $114.88
You Save: $35.61 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Piston Set-Right; Piston, Piston & Pin Assembly
- Manufacturer Note: STD GRADE"A"
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006-2009 Subaru Legacy | 2.5i, 2.5i Base, 2.5i Limited, Base | 2.5L H4
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Subaru Legacy Piston Set RH OS0.25
Part Number: 12013AB550
$65.35 MSRP: $94.72
You Save: $29.37 (32%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Piston Set-Right; Piston, Piston & Pin Assembly
- Manufacturer Note: OS0.25
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2013-2014 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DOHC
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Subaru Legacy Piston Set RH
Part Number: 12013AB260
$79.27 MSRP: $114.88
You Save: $35.61 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Piston Set-Right; Piston, Piston & Pin Assembly
- Manufacturer Note: STD GRADE"B"
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006-2009 Subaru Legacy | 2.5i, 2.5i Base, 2.5i Limited, Base | 2.5L H4
View related parts
Subaru Legacy Piston Set RH
Part Number: 12013AB270
$79.27 MSRP: $114.88
You Save: $35.61 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Piston Set-Right; Piston
- Manufacturer Note: OS 0.25
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2006-2009 Subaru Legacy | 2.5i, 2.5i Base, 2.5i Limited, Base | 2.5L H4
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Subaru Legacy Piston Set Os 0.25
Part Number: 12006AE490
$82.95 MSRP: $120.22
You Save: $37.27 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS,0.25
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.4R F/R-O, 2.4R Limited, 2.4R Touring | 2.4L H4 DIT
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Subaru Legacy PISTON SET STD A
Part Number: 12006AE590
$87.22 MSRP: $126.40
You Save: $39.18 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2023-2025 Subaru Legacy | 4 Cyl 2.4L
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Subaru Legacy Piston Set Os 0.25
Part Number: 12006AE530
$82.95 MSRP: $120.22
You Save: $37.27 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS,0.25
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DI
View related parts
Subaru Legacy Piston Set Std B
Part Number: 12006AE520
$82.95 MSRP: $120.22
You Save: $37.27 (31%)
Ships in 1-3 Business Days
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Product Specifications
- Manufacturer Note: STD GRADE"B"
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DI
View related parts
Subaru Legacy Piston Set Std A
Part Number: 12006AE510
$82.95 MSRP: $120.22
You Save: $37.27 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: STD GRADE"A"
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DI
View related parts
Subaru Legacy PISTON SET OS 0.25
Part Number: 12006AE610
$87.07 MSRP: $126.18
You Save: $39.11 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2023-2025 Subaru Legacy | 4 Cyl 2.4L
View related parts
Subaru Legacy Piston Set Std A
Part Number: 12006AE470
$82.95 MSRP: $120.22
You Save: $37.27 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: STD GRADE"A"
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.4R F/R-O, 2.4R Limited, 2.4R Touring | 2.4L H4 DIT
View related parts
Subaru Legacy Piston Set Os 0.50
Part Number: 12006AE540
$82.95 MSRP: $120.22
You Save: $37.27 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS,0.50
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DI
View related parts
Subaru Legacy Piston Set Os 0.50
Part Number: 12006AE500
$82.95 MSRP: $120.22
You Save: $37.27 (31%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: OS,0.50
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.4R F/R-O, 2.4R Limited, 2.4R Touring | 2.4L H4 DIT
View related parts
Subaru Legacy Piston Set Std B
Part Number: 12006AE480
$82.95 MSRP: $120.22
You Save: $37.27 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Manufacturer Note: STD GRADE"B"
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2020-2021 Subaru Legacy | 2.4R F/R-O, 2.4R Limited, 2.4R Touring | 2.4L H4 DIT
View related parts
Subaru Legacy PISTON SET OS 0.50
Part Number: 12006AE620
$87.07 MSRP: $126.18
You Save: $39.11 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2023-2025 Subaru Legacy | 4 Cyl 2.4L
View related parts
Subaru Legacy PISTON SET STD B
Part Number: 12006AE600
$87.22 MSRP: $126.40
You Save: $39.18 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2023-2025 Subaru Legacy | 4 Cyl 2.4L
View related parts
Subaru Legacy Piston Set RH Std A
Part Number: 12013AB450
$72.14 MSRP: $104.55
You Save: $32.41 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Piston Set-Right
- Manufacturer Note: STD GRADE"A"
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2012 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium | 2.5L H4 SOHC
View related parts
Subaru Legacy Piston Set RH Std B
Part Number: 12013AB540
$65.35 MSRP: $94.72
You Save: $29.37 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Piston Set-Right; Piston, Piston & Pin Assembly
- Manufacturer Note: STD GRADE"B"
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2013-2014 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DOHC
View related parts
Subaru Legacy Piston Set RH OS0.50
Part Number: 12013AB560
$65.35 MSRP: $94.72
You Save: $29.37 (32%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Piston Set-Right; Piston, Piston & Pin Assembly
- Manufacturer Note: OS0.50
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2013-2014 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium, 2.5i Sport, 2.5i Touring | 2.5L H4 DOHC
View related parts
Subaru Legacy Piston Set RH OS0.50
Part Number: 12013AB480
$72.14 MSRP: $104.55
You Save: $32.41 (31%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Piston Set-Right
- Manufacturer Note: OS0.50
- Position: Passenger Side
- Warranty: This genuine part is guaranteed by Subaru's factory warranty.
Fits the following Vehicles:
- 2010-2012 Subaru Legacy | 2.5i, 2.5i Limited, 2.5i Premium | 2.5L H4 SOHC

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Subaru Legacy Piston

The Subaru Legacy Piston transformed the violent explosions from the combustion cycle into smooth rotary motion, which turned the car wheels. The Piston moves vertically within the cylinder, with its rings preventing high-pressure gases from escaping. Therefore, every explosion hits hard on the crown, and that force goes through the connecting rod to the crankshaft. The Piston utilizes aluminum alloy to provide a lightweight yet robust design. This decision draws from Subaru's performance heritage, where optimized weight improves throttle response. The Legacy line relied upon, for many years, trunk style Piston that enveloped oil control rings below the pin and carried side loads, but certain turbocharged versions took on slipper style Piston with a trimmed skirt mass to spin more freely at higher revs. The distinction primarily revolves around the dimensions of the skirt and the area the gas can flow without obstruction. The trunk unit is designed for greater durability under constant stress. The slipper unit, on the other hand, minimizes friction with the sole objective of achieving faster acceleration. Subaru powertrains have stood the test of time across many generations of Legacy driving, thanks to cooling cavities fed by sprayed oil, which ensures the component withstands punishing heat.

Our website stands as the go-to online destination for OEM Subaru Legacy Piston. With complete lines of genuine Subaru Legacy Piston 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 Legacy Piston Parts Questions & Experts Answers

Piston Set RH
12013AB250
Q:
How to remove pistons and piston pins on Subaru Legacy?
Posted by Dylan G.
A:
Temporarily install the Crankshaft pulley bolt in the crankshaft front end to enable turning of the crankshaft and check for a wear ridge at the top of each cylinder; if present, it must be machined out before removing the pistons, using a ridge reamer to eliminate the raised material. Remove the plugs from the four service holes with an Allen wrench to access the piston pin cir clips, soaking them with penetrating oil if they are difficult to remove, and ensuring the wrench is fully inserted to avoid rounding off the hexagonal opening. Position the piston at bottom dead center by turning the crankshaft, then use needle-nose pliers through the service holes to remove the cir clips, utilizing a small flashlight to ensure proper alignment. For piston pin removal, a special tool is required to extract the pins through the service hole, which can be fabricated from steel rod; if the pins are varnished, a slide hammer or striking the tool may be necessary. Keep the pistons and pins together, marking the pistons for reinstallation in their original locations. The pistons can remain in the cylinder bores until the crankcase is separated, at which point they can be driven out with a wooden or plastic hammer handle, or they can be removed beforehand by turning the crankshaft slowly until the connecting rods push the pistons out slightly, inserting cleaned and oiled piston pins into the connecting rods through the service holes, and then turning the crankshaft until the pin pushes the piston from the bore before pulling the pistons out.
Answered by Subaru Parts Specialist Gary / Jan 28, 2025