OEM Auto Alternators

Replacing Your Alternator Before It's Too Late

The alternator charges your vehicle's battery to keep your lighting, infotainment, and other electronic systems running. From the massive infotainment screens in Ram pickups to the heated seats in a Ford SUV, the demand for electricity is immense.

The Critical Importance of OEM Alternators

Modern trucks from brands like Chevrolet and Nissan use "smart" charging systems where the alternator communicates directly with the engine computer. Aftermarket units often lack the high-quality internal voltage regulators needed to talk to these modules, which can lead to "Battery Not Charging" warnings even if the part is technically new.

Spot These Common Alternator Problems Before You Get Stranded

Battery Warning Light on Dash

Usually indicates the alternator isn't outputting enough voltage.

Dimming Headlights at Idle

This means the alternator is struggling to keep up with the electrical load.

High-Pitched Whining Noise

Usually means the internal bearings are failing.

Flickering Interior Lights

Often a sign of a failing voltage regulator.

Electrical Burning Smell

If the internal windings are shorting out, they will produce a distinct acrid smell.

Strange Shifting Transmission

Low voltage can confuse the transmission computer. If your vehicle is shifting strangely, check the alternator output before the gearbox.

Dead Battery After a Short Drive

The alternator is not recharging the battery. Have the battery tested to ensure it can still hold a charge.

Don't let a weak alternator leave you stranded in the driveway. To ensure you receive the exact parts designed for your model, reach out to us at Parts Mart today.