Audi A4 Key Replacement Guide

Last updated: September 2026 · Verified against OEM part numbers

Compatible keys for Audi A4

Years	Photo	Key
2009-2018		8K0959754B 8T0959754G IYZFBSB802 315MHz 7945 Chip 3+Start Button Smart Key for Audi A4 Q5 SKU: PCK-AU-2009-O
2009-2018		4H0959754K 8T0959754K 868MHz 7945 Chip 3+Start Button Smart Key for Audi A4 A5 SKU: PCK-AU-2015-O
2016-2021		KYDZ 315MHz 3+Panic Button Keyless Go MLB Smart Key for Audi A4 A5 Q5 Q7 SKU: KYDZ 奥迪A4 MLB 3+1键 315
2016-2021		KYDZ 4M0959754CB 4M0959754AL 315MHz 3 Button Keyless Go MLB Smart Key for Audi A4 A5 Q5 SKU: KYDZ 奥迪A4 MLB 3键 315
2017-2021		KYDZ 4M0959754BD 4M0959754AK 434MHz 3+Panic Button Keyless Go MLB Smart Key for Audi A4 A5 Q5 Q7 SKU: KYDZ 奥迪A4 MLB 3+1键 433
2017-2021		KYDZ 4M0959754CC 4M0959754CS 4M0959754CR 434MHz 3 Button Keyless Go MLB Smart Key for Audi A4 A5 Q5 SKU: KYDZ 奥迪A4 MLB 3键 433
2006-2011		8E0837220R 315MHz 48 Chip Flip Remote Key with OEM Board for Audi A4 SKU: PCK-AU-2039-O
2009-2018		8K0959754D 8K0959754H 8T0959754J 868MHz 46 Chip Refit Smart Remote Key for Audi A4 S4 (Lamborghini Style) SKU: PCK-AU-2051
2010-2014		8K0959754G 8T0959754D 8T0959754F 433MHz 46 Chip Refit Smart Remote Key for Audi A4 Q5 (Lamborghini Style) SKU: PCK-AU-2052
2009-2018		4H0959754K 8T0959754K 868MHz 7945 Chip 3+Panic Button Smart Key for Audi A4 A5 SKU: PCK-AU-2016-O
2009-2018		8K0959754B 8T0959754G IYZFBSB802 315MHz 7945 Chip 3+Panic Button Smart Key for Audi A4 Q5 SKU: PCK-AU-2010-O
2009-2018		4H0959754K 8T0959754K 868MHz 7945 Chip 3 Button Smart Key for Audi A4 A5 SKU: PCK-AU-2014-O
2009-2018		8K0959754B 8T0959754G IYZFBSB802 315MHz 7945 Chip 3 Button Smart Key for Audi A4 Q5 SKU: PCK-AU-2008-O
1997-2005		4D0837231E 315MHz 48 Chip 3+Panic Button Flip Remote Key for Audi A4 A6 SKU: PCK-AU-2042
2009-2018		8K0959754D 8K0959754H 8T0959754J 868MHz 46 Chip Smart Remote Key for Audi A4 S4 A5 S5 SKU: PCK-AU-2023-O
2010-2014		8K0959754G 8T0959754D 8T0959754F 433MHz 46 Chip Smart Remote Key for Audi A4 Q5 S5 SKU: PCK-AU-2021-O
2009-2011		KYDZ 8E0837220Q 8E0837220K 8E0837220D 433MHz 48 Chip Flip Remote Key for Audi A4 SKU: PCK-AU-2041-O
2010-2014		KYDZ 8K0959754G 8T0959754D 8T0959754F 433MHz 46 Chip Smart Remote Key for Audi A4 Q5 S5 SKU: PCK-AU-2020-O
1997-2005		4D0837231P 315MHz 48 Chip 3+Panic Button Flip Remote Key for Audi A6 SKU: PCK-AU-2044
2002-2004		4D0837231M 315MHz 48 Chip 3+Panic Button Flip Remote Key for Audi A6 SKU: PCK-AU-2046
2009-2018		KYDZ 8K0959754D 8K0959754H 8T0959754J 868MHz 46 Chip Smart Remote Key for Audi A4 S4 A5 S5 SKU: PCK-AU-2022-O

Before you order

• Match the year range — Audi 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 Audi A4 key?

The Audi A4 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 Audi A4?

The Audi A4 (2009-2018) uses the 8K0959754B 8T0959754G IYZFBSB802 315MHz 7945 Chip 3+Start Button Smart Key for Audi A4 Q5 (SKU PCK-AU-2009-O). Check the table above for all compatible options, verified against OEM part numbers.

Do you supply Audi A4 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 Audi A4 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 Audi keys · All guides · Key Finder

More Audi guides: A1 · A3 · A6 · Q3