bgambino Posted October 20, 2015 Share Posted October 20, 2015 95 legacy--147k ,,,,clean car with 2.2L cam or crank sensor would probably leave you stranded if they failed right? I don't like just throwing money out there for parts but would it make sense to change them now? $85.10 ea online at walker renton subaru on west cost Autzone has non oem for: cam--$57 crank--$24...! What to do.....? Quote Link to comment Share on other sites More sharing options...
lmdew Posted October 20, 2015 Share Posted October 20, 2015 No they last forever! Quote Link to comment Share on other sites More sharing options...
desertsubaru Posted October 20, 2015 Share Posted October 20, 2015 The do fail but not very often. You could change them and keep the old ones for back up. Quote Link to comment Share on other sites More sharing options...
idosubaru Posted October 22, 2015 Share Posted October 22, 2015 Very rarely fail. When they do they don't always leave you stranded. I wouldn't replace them. They're so easy to replace, buy two used ones. Fuel pump, alternator, coil pack, starter...probably a few other things are probably more likely to fail and leave you stranded. Quote Link to comment Share on other sites More sharing options...
Bushwick Posted October 22, 2015 Share Posted October 22, 2015 You'd be better off replacing the fuel filter, air filter, plugs, wires, and fresh oil. If it's still running the factory knock sensor, that seems to definitely fail and lots of us are replacing them within 30k miles of you. They either crack, or the wiring breaks contact internally at the 90 degree bend it has to make to face the factory connector. Coils can get weaker over time, but still provide enough spark to run. Your call there. Quote Link to comment Share on other sites More sharing options...
lstevens76 Posted October 24, 2015 Share Posted October 24, 2015 I agree with replacing other "normal maintenance" items, but the crank sensor will leave you stranded if it fails. I also agree on the "rarely goes out" as well. Both of them are simply using magnetics to read the position of the crank/cam. There are no moving parts to the sensors themselves and unlike other sensors they are not in the exhaust flow, fuel flow, air flow, etc... and not required to read liquids or air making them very rare to fail compared to other sensors in the system (such as the MAF). Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted October 24, 2015 Share Posted October 24, 2015 They're so easy to change, its not necessary to change them during a belt job. One thing I do make sure of, is that the crank sensor can be easily removed from the oil pump housing. The housing corrodes and can cause the sensor to get stuck, and often requires destroying the sensor to get it out. I always make an attempt to remove the old sensor, clean the bore and apply antiseize to the sensor and bore, so that IF it goes bad its easy to change. If the old sensor is stuck, leave it alone. Quote Link to comment Share on other sites More sharing options...
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