Smart A450 Key Replacement Guide

Last updated: September 2026 · Verified against OEM part numbers

Compatible keys for Smart A450

Before you order

• Match the year range — Smart 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

What frequency is the Smart A450 key?

The Smart A450 key operates on 433 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 Smart A450?

The Smart A450 (2001-2007) uses the 433MHz Remote Head Key for Mercedes Smart Fortwo Passion Roadster. Check the table above for all compatible options, verified against OEM part numbers.

Do you supply Smart A450 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 Smart A450 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 Smart keys · All guides · Key Finder

More Smart guides: Fortwo · All Models · Fortwo + · Fortwo W453