2012 Lexus RX
Key Replacement - Save vs Dealer in Ventura County
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2012 Lexus RX
Key Options
Dealer-grade key for a fair, honest price
Lexus Key: We Come to You
One comes to you, one makes you wait
2012 Lexus RX Smart Key Replacement - Fast, Affordable & Professional
A real estate agent called me at eight in the morning from the Telegraph Road shopping corridor in Ventura. She had a showing at nine, clients already confirmed, and her 2012 Lexus RX wouldn't respond to the push-to-start button. She kept pressing the fob against the steering column like she read somewhere. Nothing.
I pulled into the lot in about 25 minutes. She was standing next to the RX holding the fob in both hands like she was trying to warm it up.
First thing I did was pop the HYQ14ACX shell open right on the hood. The CR1632 was original, date code matched 2012. Dead as it gets. I swapped it, but the start button still showed "Key not detected" on the multi-info display. That pointed to a registration dropout, something the third-gen RX does occasionally when the fob battery dies slowly instead of all at once. The smart ECU on these, part number 89990-48163, can lose sync with a fob that's been sending weak signals for weeks.
I connected through OBD, cleared the communication fault in the smart key ECU, and re-registered the fob. Then the real test: walk every door handle for touch-to-lock, touch-to-unlock, trunk release, and push-to-start from both front seats. All four buttons on the fob responding clean.
Total hands-on time was maybe 20 minutes. She made her showing. The dealer route would have meant a tow, a wait, and a missed appointment worth more than any key bill.
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Lexus RX Rapid Response, Done Right
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Real Reviews From Real Driveways
Customers who never left their driveway
“My ignition would not turn in La Jolla and I thought I needed a tow. EZ Car Keyz repaired the ignition on the spot and also made a spare key for safety. The technician worked carefully and confidently.”
“Niv showed up, did his thing, and just like that I had two new keys for a fraction of what the dealership quoted. I have zero reservations recommending him to anyone who needs car keys replaced.”
“We had one broken key for our Honda Civic and one working key for our Lexus. Tim came out and cut three remote car keys at a great price. All keys worked perfectly. Professional, courteous, and highly recommended.”
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