The alternator I bought from you doesn't work.

Each alternator is bench-tested before shipping. Apparent failure is usually due to ordering the wrong unit, shipping damage, or installation mistakes. Verify the part number, inspect for damage, and review the proper installation steps (Technical Tip TT-648) before contacting support.

The alternator I bought from you doesn't "put out".

Low-output symptoms are often caused by factors outside the alternator. Measure voltage directly at the rear of the unit with a digital meter; if readings seem low, check the common issues listed below or return the alternator for a free bench test.

High-output alternators ship with an overdrive pulley that may require a belt about 1 inch shorter than stock. Use a quality, oil-free belt to prevent slip and ensure full output.

Regulator plug not plugged in, not seated properly or pinched wire

Make sure the small regulator plug on the alternator is fully seated and oriented correctly. A pinched or missing connection will prevent charging. Self-exciting models (e.g., Fitzall 220A+) do not use this plug.

Battery warning light bulb in dash missing, blown or bad connection

Some vehicles rely on the dash battery-warning bulb to excite the alternator. A blown, missing, or poorly connected bulb can cause a no-charge condition.

Customer changed alternator pulley

Replacing the supplied overdrive pulley with a larger-diameter pulley slows the alternator and decreases charge output.

Vehicle crankshaft pulley diameter too small

Aftermarket under-drive crank pulleys spin accessories more slowly and can severely reduce alternator output. Ensure the crank pulley is at least OEM size.

Main vehicle charge wire too small or not upgraded

Factory charge wiring is sized for OE amperage. When loads rise, upgrade to a heavier-gauge cable such as the Big Zero kit to avoid voltage drop and false low-output symptoms.

Too many grounds, insufficient grounds, or just bad wiring

Improper, corroded, or excessive grounds-as well as undersized or poorly crimped wires-can cripple alternator performance. Have a qualified technician inspect and correct wiring.

Bad, old, weak, damaged or cheap battery

Weak or inexpensive batteries-especially some gel-cell types-may not accept the alternator's current. Use a healthy wet-cell battery with sufficient cold-cranking amps.

Alternator possibly damaged during installation

High-output units contain sensitive electronics. Skipping the recommended battery-disconnect procedure or other steps in Technical Tip TT-648 can damage the regulator and cause no-charge conditions.

The alternator I bought from you doesn't fit.

Direct-fit models require no hardware changes. Universal Fitzall 220A+ units need custom brackets and may require a shorter belt.

Do you sell brackets, spacers or hardware to mount the Fitzall on my particular application?

Due to the vast number of vehicles, PowerBastards does not supply custom mounting hardware. Most customers fabricate brackets themselves or hire a qualified shop.

I tested my alternator and it only makes 30A.

Alternators supply only the amperage the system demands. Clip-on amp meters can be inaccurate; 30 amps may be normal at low load. Send the unit in for a free certified output test if in doubt.

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High Output Alternators for BMW

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When it comes to driving a BMW, it’s more than just a car — it’s an experience. Every BMW owner knows that keeping all those high-end electronics, lighting, and advanced systems running perfectly requires serious power. That’s where High Output Alternators for BMW come in. At PowerBastards, we proudly offer a range of premium options designed to keep your BMW performing at its peak, no matter how demanding your setup gets.

Why Upgrade to High-Output Alternators for BMW?

Your factory alternator might have been fine when your BMW rolled off the lot. But if you've added a powerful sound system, upgraded lighting, or additional tech features, the standard alternator can quickly get overwhelmed. High-output alternators for BMW provide the extra amperage your vehicle needs to power everything without breaking a sweat.

A BMW high-amp alternator delivers reliable energy to all critical systems, preventing those annoying dim lights and sudden voltage drops. With a high amperage alternator for BMW, you get smoother starts, stable power for electronics, and peace of mind on every drive.

BMW Performance Alternator: Engineered for True Enthusiasts

Looking for that perfect blend of reliability and performance? A BMW performance alternator is your answer. Whether you're hitting the track or cruising downtown, these alternators are built to handle heavy electrical loads while maintaining peak engine efficiency.

Each BMW alternator upgrade from PowerBastards is tested under real-world conditions to make sure it stands up to everything your car can throw at it. From powering aftermarket accessories to supporting advanced driver-assistance systems, our alternators are designed to enhance every part of your driving experience.

Perfect Fit for Your BMW Model

Every BMW is unique, which is why our options are customized for popular models such as the

3 Series,
5 Series,
X3,
X5,
M3,
Z4.

Each aftermarket alternator BMW owners find here is carefully crafted for a seamless fit and easy installation. You won’t have to worry about complicated modifications or additional parts — just a straightforward upgrade that works.

Our heavy-duty alternator BMW lineup also supports those who demand maximum reliability for daily driving or long road trips. With a focus on durability and consistency, these alternators keep your BMW ready for anything, rain or shine.

Benefits of Choosing PowerBastards

At PowerBastards, we know BMW owners expect nothing but the best. That’s why our High Output Alternators for BMW are designed to exceed OEM standards. Every unit undergoes rigorous testing to ensure top-tier quality and performance.

When you choose a BMW high amp alternator from us, you’re investing in:

Increased electrical output for all your needs.
Improved battery life and system reliability.
Easy drop-in installation with no surprises.
A robust build that stands the test of time.

Ready to Upgrade Your BMW?

If you’re ready to take your BMW’s electrical system to the next level, our high-output alternators for BMW are the way to go. Whether you want a BMW performance alternator for weekend drives or a heavy-duty alternator BMW for everyday reliability, PowerBastards has you covered.

Explore our full selection today and find the perfect match for your model. Your BMW deserves an alternator that keeps up with your lifestyle — powerful, reliable, and always ready for the road ahead.