Car transponder key cloning?

[Pilgrimsmaster]

@ItaBeAight

new keys cut for the car would also need their chip removed before they would work.

I still have the spare ones that I removed in with my test cards.

@ncc74656

I’d heard of people doing that back in the day

I have done that also in the past, I found another option at the time, but didn’t want to wait the 6 weeks to arrive ( Aliexpress ) , this option was used “recently” by @darthdomo

@darthdomo

For my particular car, ignition security consists of the GM PASSKEY 3 transponder immobilizer system, along with a physical steering lock inside the ignition switch.

Thankfully, the aftermarket remote start people had already thought of a good transponder bypass solution.

This is a transponder bypass module, made by the company BANVIE. This particular model appears to have been discontinued a few days after I bought it, but there are tons of models very similar.
It consists of an inner compartment with an antenna that you slip your transponder key into (or just the chip from the top of the key), along with an antenna loop that goes around the immobilizer ring. It just takes 12 volts as well. I decided to add another relay to my board, to allow me to not turn on the bypass module until authentication had occurred.

Now, there was a problem, I only had a single key. So, I went to a local hardware store (Ace hardware), and had a spare key made without the transponder (told them I wanted a door key). Cost me $4, and this allowed me to have a key to use in the ignition or in the doors, while keeping my original key intact.