Cadillac STS Key Replacement Guide

Last updated: September 2026 · Verified against OEM part numbers

Quick answer — Cadillac STS

The Cadillac STS (2008-2011 and other model years) uses the M3N5WY7777A smart key — 315 MHz (SKU PCK-CA-2029-P) — verified against the original OEM part number. See every compatible option in the table below.

OEM part number: M3N5WY7777A
Frequency: 315 MHz
Key type: Smart Key
Years covered: 2008-2011 and other model years
Wholesale: MOQ 5 units per SKU, models mixable in one order

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Compatible keys for Cadillac STS

Years	Photo	Key
2008-2011	—	EZRF M3N5WY7777A 315MHz 46 Chip Smart Key for Cadillac CTS 2008-2014 SKU: PCK-CA-2029-P
2008-2011	—	EZRF M3N5WY7777A 267F-5WY7777A 315MHz 46 Chip Smart Key for Cadillac STS CTS SKU: PCK-CA-2028-P
2010	—	5WY-8423 433MHz 7952 Chip 4+1 Button (Trunk) OEM Smart Key for Cadillac STS SKU: PCK-CA-1005

Years

Photo

Key

2008-2011

—

EZRF M3N5WY7777A 315MHz 46 Chip Smart Key for Cadillac CTS 2008-2014
SKU: PCK-CA-2029-P

2008-2011

—

EZRF M3N5WY7777A 267F-5WY7777A 315MHz 46 Chip Smart Key for Cadillac STS CTS
SKU: PCK-CA-2028-P

2010

—

5WY-8423 433MHz 7952 Chip 4+1 Button (Trunk) OEM Smart Key for Cadillac STS
SKU: PCK-CA-1005

Before you order

Frequently asked questions

What frequency is the Cadillac STS key?

The Cadillac STS key operates on 315 MHz. Frequency is fixed in the key hardware and cannot be reprogrammed — a key bought on the wrong frequency will not lock, unlock or start the car.

Which key fits my Cadillac STS?

The Cadillac STS (2008-2011) uses the EZRF M3N5WY7777A 315MHz 46 Chip Smart Key for Cadillac CTS 2008-2014 (SKU PCK-CA-2029-P). Check the table above for all compatible options, verified against OEM part numbers.

Do you supply Cadillac STS keys wholesale?

Yes. We supply locksmiths and key distributors at wholesale prices with MOQ from 5 units. Message us on WhatsApp for today's price list.

Can a Cadillac STS key be programmed without the dealer?

In most cases yes, using tools like Xhorse, VVDI or Autel. We can advise the right programmer for each key SKU.

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