VOFONO key fob replacement for Cadillac CTS/STS 2008–2015 (FCC ID M3N5WY7777A) — 5‑button, pre-tested with battery

VOFONO's 5-button key fob is a complete replacement remote programmed to match Cadillac CTS (2008–2015) and STS (2008–2011) models using FCC ID M3N5WY7777A.

If your original remote is lost, damaged, or its buttons no longer respond, this aftermarket VOFONO keyless entry remote offers a direct-fit solution. The package arrives with the circuit board and battery installed and is tested for radio transmission before shipping. It is designed to accept the same cut and programming procedures as OEM units, so a professional locksmith or dealer is typically needed to finish setup and key cutting.

Will this VOFONO fob fit my Cadillac model and year?

Yes — this replacement is made to match the specifications required by specific Cadillac CTS and STS years. Confirm compatibility by checking your vehicle’s model year and the FCC ID on your old remote.

• Compatible with Cadillac CTS: 2008–2015.
• Compatible with Cadillac STS: 2008–2011.
• Matches FCC ID: M3N5WY7777A and OE numbers 25943676 / 25943677.
• Verify your current remote’s FCC ID before ordering.

How does programming and key cutting work for this replacement remote?

This VOFONO remote ships with the electronic board and battery installed but does not come pre-programmed to a specific vehicle. Programming often requires dealer-level tools or a qualified locksmith capable of pairing the remote to your vehicle’s immobilizer system. Expect a professional to perform the final steps for security and reliability.

• Includes circuit board and battery, pre-tested for transmission.
• Professional programming usually required (locksmith or dealer recommended).
• Bring vehicle proof and VIN to speed up pairing and cutting.
• Remote is ready for cutting to match your key blade if necessary.

What features and functions can I expect from this VOFONO 5-button key fob?

The remote replicates standard keyless functions found on original Cadillac remotes: lock, unlock, trunk release, panic, and remote start where supported. Button responses and RF transmission are tested at the factory, ensuring the hardware arrives functional. Note that vehicle-specific features (like remote start) require the vehicle to be factory-equipped and properly set up to accept the fob.

• Five-button layout: lock, unlock, trunk, panic, remote start (if equipped).
• Comes with battery installed and electronics tested before shipping.
• Designed to match OEM FCC ID and electrical specifications.
• Durable housing compatible with original key blade and shell.

What happens if I need help after purchase?

VOFONO provides customer support for product questions and assistance. If anything seems unclear about fitment, programming steps, or the item received, contact the seller’s support team for prompt guidance and troubleshooting. Returns and replacements are handled according to the vendor’s policy if the remote is defective on arrival.

• Customer support available for fitment and setup questions.
• Every remote is tested for radio transmission prior to shipping.
• Follow vendor return policy for damaged or non-working units.
• Professional locksmith recommended for cutting and programming.

Who is this for: This VOFONO key fob is ideal for Cadillac owners who need a like-for-like replacement for a lost or broken remote and who have access to professional key cutting and programming services. It suits drivers of CTS models from 2008 through 2015 and STS models from 2008 through 2011 who want a tested, ready-to-program aftermarket option that matches FCC ID M3N5WY7777A and related OE references.