Recently my keyless remote started stalling to lock/unlock so I replaced the battery but it's still acting up & possibly getting worse.

Any thoughts to what the issue may be?

both remotes do the same thing?

Unfortunately I only have one remote. Downfalls of buying pre-owned

ugh. When you press any function on the key does the red LED blink brightly? Did you buy fresh batteries? Sometimes they are bad. If it continues you may have to get it into the dealer for a diagnostic test and pray it's not the RF amp in the car.

The keys do go bad sometimes and unfortunately with only one key it is hard to self diagnose this.

Thanks for the head up. I got the battery from the dealer but fingers crossed it was a bad battery. I'll check tomorrow for the red LED...I know it definitely lights up when it finally connects. Would the RF Amp be covered under warranty?

The red LED is at the bottom left of the panic triangle on the key face and lights up every time a function on the key is pressed. If you are under warranty everything should be covered. You may want to order a spare key. One key is living dangerously!