There may be some additional consideration for luxury-branded models, but for the standard models, the consideration is primarily whether it works for the auto-buyer every time, not how this could be used as an attack vector.
"If the wrong code has been entered 7 times (35 consecutive button presses), the keypad will go into an anti-scan mode. This mode disables the keypad for one minute and the keypad lamp will flash. The anti-scan feature will turn off after one minute of keypad inactivity."
The Ford Explorer is hardly a “luxury-branded model”, and I’d venture that Ford uses this same system on all their models, across brands.
Would you mind listing some?
This is transparent to the user - it's just as if you hit a wrong button - but prevents using codes like this.
I don't know if this is common to all keyless entry systems, but you'd hope it would be!
Of course you can still enter every every code, just it would take 80,000 button presses on a 10-digit lock.
[1] http://www.assar.ee/cgi-bin/document.cgi?doc=356 see page 12 'access blocking'