MechanMagic Cadillac key fob replacement — 5-button proximity smart remote (HYQ2AB, 315 MHz) pre-tested with battery

MechanMagic’s 5-button proximity key fob replacement provides a fully assembled, pre-tested smart remote compatible with select Cadillac ATS, XTS and CTS push-start models (315 MHz, FCC ID HYQ2AB).

This remote is a direct-fit aftermarket key fob built to replace lost or damaged OEM smart remotes for certain Cadillac vehicles. It ships with the internal electronics and a lithium coin cell battery already installed so the unit is ready for professional programming. Note: this is not an OEM part, comes without a Cadillac logo, and works only with push-button start vehicles — it will not function with traditional keyed ignitions.

Which Cadillac models and part numbers will this remote work with?

The MechanMagic fob is engineered to be compatible with a range of Cadillac ATS, XTS and CTS model years when the factory remote uses FCC ID HYQ2AB and 315 MHz frequency. Confirm your vehicle’s original part number and FCC ID before purchasing.

• Compatible model years: ATS (2015, 2016, 2018, 2019), XTS (2015, 2016, 2018, 2019), CTS (2014–2019).
• Supported OEM part numbers include 13580811, 13594024, 1358539, 13598507, 13510254, 13598530.
• Frequency: 315 MHz; FCC ID: HYQ2AB.

How is this fob powered and prepared out of the box?

The replacement arrives with the electronic board and lithium 3V button battery already installed so it can be verified by a locksmith or dealer immediately. Because the unit is pre-assembled and tested, you avoid the hassle of transferring parts from an old fob.

• Battery: lithium 3V coin/button cell included and preinstalled.
• Electronics: factory-style PCB installed and pre-tested for functionality.
• Packaging: single complete keyless entry remote supplied; no logo on the shell.

Do I need special tools to program this remote to my Cadillac?

This aftermarket smart key requires professional programming by a qualified locksmith or dealership — it does not support user self-programming. Bring proof of ownership and your vehicle for secure pairing and immobilizer synchronization.

• Programming method: dealer or locksmith programming required.
• Bring: vehicle, proof of ownership, and the new fob for pairing.
• Note: not compatible with non-push-start (keyed) models.

What functions does the 5-button remote support and are there limitations?

The remote replicates standard smart features like lock/unlock, trunk release, panic and remote start (where vehicle supports remote start). However, because this is an aftermarket shell and electronics set, cosmetic branding and OEM warranty coverage may differ from an original factory unit.

• Buttons: lock, unlock, trunk, remote start (vehicle dependent), panic.
• Limitations: no Cadillac logo; non-OEM part with dealer/locksmith programming required.
• Vehicle fit: only compatible with push-start systems using HYQ2AB/315MHz.

Who this is for: This MechanMagic key fob replacement suits Cadillac owners who need a reliable aftermarket smart remote that mirrors OEM features without the original branding. It’s ideal if you want a ready-to-program, pre-tested unit to take to your locksmith or dealer as a replacement or spare for compatible ATS, XTS and CTS push-start models. If you are unsure about fitment, compare your original remote’s FCC ID and part number to the compatibility list before buying.