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Old 10-12-2020, 09:01 AM   #1
Scooby Newbie
Member#: 244242
Join Date: Apr 2010
Chapter/Region: South East
Location: Florida
2009 Impreza

Default Impreza to Forester engine/trans swap

Hi everyone,

I have a wrecked 2009 impreza with a good motor and transmission. I'd like to know if I can just drop both into a 2010 Forester without issues?
I don't have the trans #'s off hand. I understand gearing might be slightly different.

Will the Forester ecu have any issues? I can swap whatever parts between both cars.

I did do a search on this. Most info I can find is for 99-04 Subarus.

Thanks in advance
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Old 10-16-2020, 10:12 PM   #2
Scooby Newbie
Member#: 348982
Join Date: Mar 2013
Chapter/Region: NESIC
Location: Shoreham, VT
03 OBS


No the 2009 will not swap into the 2010 forester. The forester has 4.11 final drive and rear end while the impreza has 3.90

You would need the transmisson and rear end from the impreza, hopefully you have the car. If the plugs for the engine and transmission are the same I would say the ECU should be fine with the motor, its going to be the transmission that might give it issues as it may be looking for sensors from a forester and not an impreza
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Old 10-17-2020, 11:39 AM   #3
Elbert Bass
Scooby Specialist
Member#: 283429
Join Date: May 2011
Chapter/Region: South East
Location: Down yonder.
2016 Fuji Sunfire 03


Those years are compatible as far as the engine. Easiest and best way to do it is transfer intake, exhaust, wiring harness, alternator, A/C compressor from original engine to donor engine. That's done all the time. As mentioned transmission is a different story due to AWD and keeping matching gear ratios on final drives.
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