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2005-2007 Odyssey: Alternator Replacement

Time: 2 hrs

Difficulty: moderate to difficult 

Cost: $80-150 (brand)


After the battery starts the vehicle, all electrical function is power-sourced from the alternator. If the alternator fails, or drops below battery voltage, the battery will supply current until it discharges.

The alternator is the current-generator driven off the vehicle's primary drive belt. It is supplied by battery voltage on startup to excite the internal windings. Once operating, current flows from the alternator to charge the battery and supply the host of vehicle electrical demands. Because engine RPM varies, the output voltage is regulated to an even 13.5-14.5 volts.


If alternator output voltage is less than battery voltage (12.6 volts for a fully charged automotive battery), it likely needs to be replaced. Alternator output can be checked with a voltmeter at the battery.

Watch the video below to see how the alternator was diagnosed and replaced on a 2007 Honda Odyssey.

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Blow Gun

Adjustable rate air nozzle

Odyssey Alternator

Remanufactured alternator

Premium Multimeter

Fluke digital multimeter

Battery Protection Spray

Corrosion inhibitor

Purple Power

Industrial strength cleaner and degreaser

Primary Drive Belt

Serpentine drive belt, Odyssey

Economy Multimeter

Digital multimeter

Battery Terminal Brush

Battery cable and terminal cleaning brush

Battery Cleaner Spray

Neutralizes and dissolves battery corrosion

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