Keys Made Here

Smart Keys

Transponder Keys, Dealer Chip Keys & Key Replacement/Duplication

There’s a common misconception around car key replacement. First of all, you don’t need to go to the dealership! For the fraction of the cost, Speed of Sound can replace and duplicate car keys for any make or model. We not only beat the dealership price, we also guarantee our work will be at the highest level of quality.

Our cutting edge technology allows us to duplicate and replace car transponders, chip car keys, push-to-start keys, dealer chip keys and more.

  • Transponder Key Replacement
  • Transponder Key Duplication
  • Laser Cut Car Key Replacement
  • Laser Cut Car Key Duplication
  • Car Key Programming
  • Remote Programming

Speed of Sound offers 24/7 assistance
Call today for more information! 603-766-6666

You rely on your automobile...

Let us make it an awesome experience!

85 Main St. Somersworth, NH 03878


Monday-Friday: 9:00am – 5:00pm
Saturday: Closed
Sunday: Closed