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2021 Forester Limited
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That's a bit high in my opinion.

The sensor is about a 10 minute job to change, if all goes well.

It could be done faster, but I'm being generous.

Depending if the car need to be on the lift, or if it can be done by reaching down from the top like the 2010 Impreza.

But to me, $500 would be a more fair price if using a Subaru sensor.

All it takes is a simple reset to clear the code, or disconnect the battery.
 

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2021 Forester Limited
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1,437 Posts
It's happening on cold and wet days, cold start wasn't mentioned.

It could be just the o2 connector causing issues. It shouldn't stall the engine though, unless it is shorting to ground either in the wiring or internally in the o2.

It almost sounds like a intermittent crank sensor issue, but that wouldn't be weather dependent, unless it is that connector.
 
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