Cadillac STS Key Replacement Guide

Last updated: August 2026 · Verified OEM part numbers

Quick answer: The Cadillac STS (2008-2011) uses the EZRF M3N5WY7777A 315MHz 46 Chip Smart Key for Cadillac CTS 2008-2014 (SKU PCK-CA-2029-P) — verified against OEM part numbers. See the full compatibility table below.

Compatible keys for Cadillac STS

Before you order

• Match the year range — Cadillac changed key systems across model years. Check your registration year.
• Check your current key — the OEM number printed on your key matches the table above.
• Programming — smart keys need a compatible programmer (Xhorse, VVDI, Autel). We can advise which one works for each key.

Frequently asked questions

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.

Related: All Cadillac keys · All guides · Key Finder