Preventive Maintenance
Worn spark plugs cause misfires, rough idling and poor mileage. We replace them with the type your engine calls for and check the coils and boots while we're in there.
Spark plug replacement means taking out the old plugs and installing new ones of the type and gap your engine is designed for. Spark plugs light the fuel in each cylinder thousands of times a minute. Over time the electrodes wear, the spark gets weaker, and the engine starts to misfire.
Standard copper plugs often last around 30,000 miles. Platinum and iridium plugs usually last much longer, often 60,000 to 120,000 miles. Your maintenance schedule lists the interval for your engine.
We check your schedule and the engine's condition, and if there's a misfire, we find out whether it's the plug, the coil or something else. On some engines, including some V6s, the rear plugs sit under the intake and take more time to reach. We'll tell you up front if yours is one of them. You get photos, videos and a clear estimate before any work. Nothing gets done until you approve it.
Recent work
Kemah · November 2026 · From our shop records
The vehicle owner reported a slow start and said the vehicle shudders when idle.
The technician at our Kemah shop started with a diagnosis and a Vehicle Condition Assessment (VCA). The starter motor was then removed and replaced to address the slow start. The spark plugs and ignition coils were also removed and replaced to address the shudder at idle.
Need spark plug replacement? Bring it to our Kemah shop.
4.9 stars from 532 Google reviews
The engine shakes or stumbles while you're stopped.
Reviews
4.9 stars on Google from 532 reviews as of November 2026
“Went in to get my spark plugs replaced and got them replaced within a day for a good price! The shop was nice and had some friendly dogs hanging around. Free donuts were a nice touch and even cooler next to a floating lightbulb! Thanks!”
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 preventive maintenance services.
Keep your engine protected with conventional or synthetic oil changes using quality filters.
Learn moreClean filters protect your engine, cabin air, and fuel system. We replace all filter types using OEM-quality parts.
Learn moreKeep your vehicle running smoothly with transmission, coolant, brake, and power steering fluid flushes and top-offs.
Learn moreFAQ
Common questions about our spark plug replacement.
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
