Auto Repair
Battery light on, dim lights or a car that won't start? We test the charging system to see if it's the alternator, the battery or the belt, and show you what we found before any work.
Alternator repair starts with testing, because a weak battery, a slipping belt and a failing alternator can look the same from the driver's seat. The alternator charges the battery and powers the electrical system while the engine runs. When it stops charging, the car runs off the battery until the battery runs down, and then it won't start or it dies on the road.
We test the battery and the charging output with the engine running, and check the belt that drives the alternator. Testing tells us whether it's the alternator, the battery or something else, so you're not replacing parts on a guess. You get photos and a clear estimate, and nothing is done until you approve it.
On a recent Ford Expedition, the battery read about 12.55 volts with the engine running, below the normal charging range of about 14.0 to 14.4 volts. The alternator had no charging output, and we replaced it. Another owner's vehicle came in because it wouldn't start, and left with a new alternator, battery and serpentine belt.
Our ASE-certified technicians work on all makes and models, gas and diesel, and most repairs carry up to a 36 month, 36,000 mile nationwide warranty through TechNet.
Recent work
Kemah · November 2026 · From our shop records
The battery tested bad and had a dead cell. At our Kemah shop, we looked at a driver's vehicle at 40,000 miles after the owner brought it in for intermittent slow cranking. Our tech ran a battery and charging system check.
The team put in an AGM battery.
Need alternator repair? Bring it to our Kemah shop.
4.9 stars from 532 Google reviews
Can mean the alternator isn't keeping up, especially at idle.
A good battery won't stay charged if the alternator isn't charging it. We test both.
Once the battery is drained, the car can't start or keep running.
Worn bearings inside the alternator can make noise before it fails.
Reviews
4.9 stars on Google from 532 reviews as of November 2026
“Awesome service”
“Excelente and fast service they did my BMW m4 oil change , their service is highly recommended”
“10/10 recommend. Amazing service. Super helpful and friendly.”
Where we work
4.9(532) as of Nov 20264.9 out of 5, from 532 Google reviews, as of November 2026
916 FM 518 East
Mon to Fri, 8:00 AM to 6:00 PM; Sat, 8:00 AM to 5:00 PM; Sun, closed
Related services
Explore our other auto repair services.
Squealing, grinding or a soft pedal? We check pads, rotors, calipers and fluid, and show you photos before any work.
Learn moreMisfires, knocks, leaks or smoke, gas and diesel. We find the cause and show you photos and an estimate first.
Learn moreOverheating, leaking coolant or a heater that won't warm up? We repair or replace the radiator, cracked hoses and worn caps.
Learn moreFAQ
Common questions about our alternator repair.
Still have questions?
Call (281) 549-4391Free shuttle, loaner cars available
Early bird and after hours drop off
Up to 36 month / 36,000 mile warranty
On most repairs, nationwide through TechNet
4.9 stars on Google
From 532 Google reviews
