The Best Volkswagen Alternators

When your alternator fails, your Volkswagen might not start. Your vehicle might also stall while you drive. That’s because the alternator powers everything electrical in your vehicle, including your battery. Having issues with your alternator? Here are some basic troubleshooting steps.

What to Do When Your Alternator Fails

Troubleshooting Alternator Issues in Your Volkswagen Tiguan

1. Check the Battery First

If your car won’t start, test the battery voltage. A weak battery may look like alternator trouble.

2. Look for Warning Lights

The battery-shaped icon on your dashboard could mean the alternator isn’t charging properly.

3. Listen for Strange Noises

Grinding or whining sounds near the engine may signal worn alternator bearings or internal failure.

4. Test the Alternator Output

Use a multimeter to see if the alternator is supplying between 13.5–14.5 volts while the engine runs.

5. Inspect the Drive Belt

A loose or damaged serpentine belt can cause your alternator to stop spinning and stop charging.

6. Check for Dim Lights or Electrical Failures

Flickering lights or failing accessories are signs the alternator isn’t keeping up with demand.

Other Parts That Affect Engine Performance

If you’re replacing your alternator, also check your spark plugs. Weak plugs can add strain to your battery and alternator during ignition.

Restore your Tiguan’s reliability with OEM alternators and engine parts. Order here from Volkswagen Parts Denver and get exclusive discounts. Still have questions? Contact us for expert assistance.