Guide · Fiat

Fiat 500X Key Replacement Guide

Last updated: September 2026 · Verified against OEM part numbers

Quick answer — Fiat 500X

The Fiat 500X (2016-2023 and other model years) uses the M3N-40821302 smart key — 4A chip, 434 MHz (SKU PCK-FA-2002-P) — verified against the original OEM part number. See every compatible option in the table below.

OEM part number: M3N-40821302
Frequency: 434 MHz
Chip / immobiliser: 4A
Key type: Smart Key
Years covered: 2016-2023 and other model years
Wholesale: MOQ 5 units per SKU, models mixable in one order

Which Fiat 500X key fits your vehicle?

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Compatible keys for Fiat 500X

Years	Photo	Key
2016-2023	—	M3N-40821302 434MHz 4A Chip 3 Button (SUV) Smart Key for Fiat 500X SKU: PCK-FA-2002-P
2016-2019	—	KYDZ 2ADFTFI5AM433TX 433MHz Megamos MQB 48Chip 3+Light Button Flip Key for Fiat 500X SKU: PCK-JP-2106-P
2016-2019	—	KYDZ 2ADFTFI5AM433TX 433MHz Megamos MQB 48Chip 3+Panic Button Flip Key for Fiat SKU: PCK-JP-2107-P
2016-2019	—	KYDZ 2ADFTFI5AM433TX 433MHz Megamos MQB 48Chip 2+Light Button Flip Key for Fiat 500X SKU: PCK-JP-2104-P
2016-2019	—	KYDZ 2ADFTFI5AM433TX 433MHz Megamos MQB 48Chip 2+Panic Button Flip Key for Fiat 500X SKU: PCK-JP-2105-P
2016-2019	—	KYDZ 2ADFTFI5AM433TX 433MHz Megamos MQB 48Chip 2Button Flip Key for Fiat 500X SKU: PCK-JP-2103-P
2016-2019	—	OEM Board 2ADFTFI5AM433TX 433MHz Megamos MQB 48 Chip 3+Panic Button Flip Remote Key for Fiat 500X SKU: PCK-JP-2102-P
2016-2019	—	OEM Board 2ADFTFI5AM433TX 433MHz Megamos MQB 48 Chip 3+Light Button Flip Remote Key for Fiat 500X SKU: PCK-JP-2101-P
2016-2019	—	OEM Board 2ADFTFI5AM433TX 433MHz Megamos MQB 48 Chip 2+Panic Button Flip Remote Key for Fiat 500X SKU: PCK-JP-2100-P
2016-2019	—	OEM Board 2ADFTFI5AM433TX 433MHz Megamos MQB 48 Chip 2+Light Button Flip Remote Key for Fiat 500X SKU: PCK-JP-2099-P
2016-2019	—	OEM Board 2ADFTFI5AM433TX 433MHz Megamos MQB 48 Chip 2 Button Flip Remote Key for Fiat 500X SKU: PCK-JP-2098-P

Before you order

Match the year range — Fiat 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 Fiat 500X key?

The Fiat 500X key operates on 434 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.

What chip does the Fiat 500X key use?

The Fiat 500X uses a 4A chip. Tell your supplier the chip type when ordering so you receive the correct blank — an ID46 blank will not replace an ID47 or 4D83 key.

Which key fits my Fiat 500X?

The Fiat 500X (2016-2023) uses the M3N-40821302 434MHz 4A Chip 3 Button (SUV) Smart Key for Fiat 500X (SKU PCK-FA-2002-P). Check the table above for all compatible options, verified against OEM part numbers.

Do you supply Fiat 500X 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.

Ready to order a Fiat 500X key?