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Q: Slow Start on 2004 Scion xB

In cold weahter my car takes an longer to turn over than it does in the summer months. it is about 4 seconds to the less than 1 second in the summer. Should i have the altenator or battery replaced, they are both original to the car?
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get the battery checked first. the colder it is outside, the less power it has. in the real cold weather, you really need a good battery to spin the motor over at the right rpms to get it to fire off right away.
battery test is very easy and is free in a lot of shops.

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