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Subaru recommends replacing your timing belt at 105k miles. Listed below are the timing belts and associated parts parts for replacing your timing belt.

Generally the timing belt is done one of three ways:

1) Replacing Timing Belt and Crank Seal.

2) Timing Belt, Crank Seal, Water Pump, Thermostat.

3) Timing Belt, Crank Seal, Water Pump, Thermostat, Tensioner, Idlers.

Cam Seals - These are not generally replaced unless they are actually leaking however if you would like to do this as a precautionary measure it will certainly save you a ton of time in the long run if done while you have the face of the engine apart. If you have a newer vehicle, I would say 2009+, I wouldn't worry about these at all, it's very unlikely that they will be needed. You may need to add the oil pump o-ring but many folks have reported not needing them.

If you would like go with 1 or 2 and just replace the timing belt, always inspect all other components such as the tensioner and idlers!

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1998 Forester 2.5L DOHC N/A
Timing Belt: 13028AA072 -
Idlers:
13073AA142 - x 2 (smooth)
13085AA080 - x 1(tooth)
Tensioner: 13033AA042 -
Crank Seal: 806733030 -
Cam Seals: 806732150 - x 4
Water Pump: 21111AA007 -
Pump Gasket: 21114AA051 -
Thermostat: 21200AA072 -
Thermo Gasket: 21236AA010 -

**Always provide VIN to double check the tensioner assembly as there is a small possibility that you could have the older style tensioner.

1999-2005 Forester 2.5L SOHC N/A
Timing Belt: 13028AA231 -
Idlers:
13073AA142 - x 1 (smooth)
13085AA080 - x 1 (tooth)
13073AA190 - x 1 (smooth)
Tensioner: 13033AA042 -
Crank Seal: 806733030 -
Cam Seals: 806732150 - x 2
Water Pump: 21111AA007 - (See fitment guide below.)
Water Pump: 21111AA230 - -OR-
Pump Gasket: 21114AA051 -
Thermostat: 21200AA072 -
Thermo Gasket: 21236AA010 -

1999-2002 Forester all take 21111AA007 pump.
2003-2005 Forester M/T take 21111AA007 pump.
2003-2005 Forester A/T take 21111AA230 pump.

2006-2010 Forester 2.5L SOHC N/A
Timing Belt: 13028AA231 -
Idlers:
13073AA142 - x 1 (smooth)
13085AA080 or 13085AA101 - x 1 (tooth)
13073AA190 - x 1 (smooth)
Tensioner: 13033AA042
Crank Seal: 806733030 -
Cam Seals: 806732150 - x 2
Water Pump: (Check)21111AA280 - *
Water Pump: (Check)21111AA290 - *
Pump Gasket: 21114AA051 -
Thermostat: 21200AA072 -
Thermostat: 21200AA170 - (2006+ N/A)
Thermo Gasket: 21236AA010 -


**Double Check water pump fitment!


2004+ Forester 2.5L DOHC Turbo
Timing Belt: 13028AA240 -
Idlers:
13073AA142 - x 2 (smooth)
13085AA080 - x 1 (tooth)
13073AA230 - (smooth)
Tensioner: 13033AA042 -
Crank Seal: 806733030 -
Cam Seals:
806742160 - X 2
806732160 - X 2
Water Pump:
21111AA240 - (2004-2007 XT)
21111AA250 - (2008-12 XT)
Pump Gasket: 21114AA051 -
Thermostat: 21200AA072 -
Thermo Gasket: 21236AA010 -


Disclaimer: I have, to the best of my ability provided the fitments of the items above. Please keep an eye out for changes in part numbers or notes as some things may need to be tweaked in the future do to inconsistencies with catalog.
 
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