2011-2014 Ford 6.7L Powerstroke Alternators

Alternators on the 2011-2014 Ford 6.7L Powerstroke

The diesel Super Duty keeps two Group 65 batteries charged with a belt-driven alternator. Single-alternator trucks use one heavy-duty unit rated around 150-157 amps. Trucks built with the dual-alternator option add a second, lower alternator mounted under the upper one, and the serpentine belt is different between the two configurations. Whatever your Powerstroke truck has, match the replacement by Ford part number, amperage and position.

What fails and why

Alternators on these trucks wear out at the bearings or the diodes, mostly at high mileage. The signs are a whine that climbs with engine speed, dim or flickering lights, dead batteries and a Check Charging System message on the dash. Two things fool people. First, faults in the wiring or the PCM command circuit produce the same symptoms, so pinpoint-test the circuit before you replace anything. Second, a bad battery overworks the alternator and causes premature failure, so a worn battery pair can take a new alternator down with it. A quick test: with the key on and the engine off, the battery light should come on. If it stays dark, look at the command circuit first.

Stock amperage vs. high output

A stock-amperage replacement is the right call for a truck running factory accessories. Step up to a high-output alternator when you have added a plow, a winch, an inverter or other high-draw equipment. High output does not fix bad wiring or tired batteries, so sort those out at the same time.

What we carry

This collection holds high-output alternators from Mean Green and XDP MFG. Mean Green's MG1627 is a 300-amp high-output alternator listed for 2011-2022 6.7L trucks. XDP MFG's XD352 HD high-output alternator comes in a wrinkle black finish and covers the same 2011-2022 range. Each is aimed at owners who need more charging capacity than the factory unit provides.

Fitment notes

Confirm whether your truck has the single or dual alternator setup, and on dual-alternator trucks confirm whether you are replacing the upper or lower unit. Check each product page for the position and configuration it replaces. Keep the serpentine belt that matches your setup. Chassis cab F-350, F-450 and F-550 trucks run their own calibration, so verify by VIN with the fitment checker before you order.

Frequently asked questions

How many amps does my 6.7L Powerstroke alternator need?

A stock single-alternator truck runs a heavy-duty unit around 150-157 amps, and matching that by Ford part number is fine for factory equipment. Plows, winches and inverters are the usual reasons to go to a high-output unit like the 300-amp Mean Green.

Should I replace the batteries when I replace the alternator?

Test them first. A bad battery overworks the alternator and can shorten the life of the new one, and the two batteries should always be replaced as a pair. A load test tells you where you stand.

My dash says Check Charging System. Is the alternator dead?

Maybe, but test before you buy. Wiring and PCM command circuit faults mimic a failed alternator. Turn the key on with the engine off: the battery light should come on, and if it does not, suspect the command circuit rather than the alternator.

Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.