Professional locksmith services
Call Us Anytime 734-497-7578

Transponder Keys Cut & Programmed in Monroe, Lenawee, Washtenaw, and Surrounding Areas!
Transponder keys are vehicle keys that contain a small electronic chip inside the head of the key. This chip communicates with your car’s immobilizer system through a unique signal. When you insert the key into the ignition and turn it, the vehicle’s computer reads the chip. If the code matches, your car will start. If not, the engine remains immobilized — a powerful theft prevention feature.
Since the late 1990s, most manufacturers have made transponder keys standard for added vehicle security. While they look similar to traditional keys, they offer a much higher level of protection and require specialized equipment to program.

Why Were Transponder Keys Introduced?
The primary reason transponder keys were introduced was to reduce car theft. Before their implementation, it was much easier for thieves to hotwire vehicles. With a transponder system in place, even if someone copies your key's shape, they won’t be able to start the engine without the correct chip signal. This electronic handshake between the key and the vehicle adds a vital layer of security.
Why You Should Always Have a Spare Transponder Key
Losing your only transponder key can be costly and stressful. Without a backup, you could end up stranded, requiring a tow and emergency locksmith service. Having a spare transponder key on hand can:
-
Save you time and money in the event of a lost or broken key
-
Prevent costly emergency service calls
-
Provide peace of mind for multiple drivers or family members
-
Make resale or trade-in of your vehicle more convenient
At CS Lock and Key, we recommend all our customers have at least one spare transponder key — and we make it easy and affordable to get one made.
Why Choose CS Lock and Key for Your Transponder Key Needs?
At CS Lock and Key, we’re a family-owned, veteran-run locksmith company committed to reliable and affordable service. When it comes to transponder keys, we bring experience, specialized tools, and a mobile service that comes directly to you. Here’s why customers throughout Monroe, Lenawee, and surrounding counties trust us:
-
✅ Certified and Insured for professional-grade work
-
✅ On-site Programming & Cutting – no need for a dealership visit
-
✅ Fast, Friendly, and Reliable Mobile Service
-
✅ We Work on Most Makes & Models
-
✅ Competitive Pricing Without Hidden Fees
Don’t wait until you're locked out or stuck without a key — call CS Lock and Key today and ask about our transponder key duplication and replacement services. We’re here to help you drive with confidence.