BorgWarner Turbo Systems

Explore our instructions showing you how to identify your Borg Warner turbocharger so that you can order the correct replacement for your vehicle.

KKK or Borg Warner part numbers have more complicated variations, and are often abbreviated on the part number plate. Please see the following examples of the KKK part numbers:-

part number

part number

K03 turbocharger part numbers may read as follows:-

  • K03-53
  • 5303-970-0053
  • 5303-971-0053
  • 5303-988-0053

All of these variants are the same part number which would be listed on our catalogue page as 5303-970-0053.

Another variation in the K03 family reads as follows:-

  • BV43-139

This variant would be listed on our catalogue page as 5303-970-0139.

K04 turbocharger part numbers may read as follows:-

  • K04-20
  • 5304-970-0020
  • 5304-971-0020
  • 5304-988-0020

All of these variants are the same part number which would be listed on our catalogue page as 5304-970-0020.

Another variation in the K04 family reads as follows:-

  • BV50-50

This variant would be listed on our catalogue page as 5304-970-0050.

KP35 turbocharger part numbers may read as follows:-

  • KP35-5
  • KP35-0005
  • 5435-970-0005
  • 5435-971-0005
  • 5435-988-0005

All of these variants are the same part number which would be listed on our catalogue page as 5435-970-0005.

KP38 turbocharger part numbers may read as follows:-

  • KP38-6
  • 5438-970-0006
  • 5438-971-0006
  • 5438-988-0006

All of these variants are the same part number which would be listed on our catalogue page as 5438-970-0006.

KP39 turbocharger part numbers may read as follows:-

  • KP39-22
  • BV39-22
  • 5439-970-0022
  • 5439-971-0022
  • 5439-988-0022

All of these variants are the same part number which would be listed on our catalogue page as 5439-970-0022.

The 970, or 971, or 988 code indicates that this is the turbo part number; alternative codes would indicate other components.

If you find that the blue plate is missing from your borgwarner turbocharger, there is a good chance that it has been remanufactured previous, don't worry send us a picture of your turbocharger and we can identify it that way.

As stated above when quoting a part number from a borgwarner turbocharger we do need to know the full part number as we often get phones calls asking for a k03 or a k04 turbocharger, this indicates the frame size of the turbocharger.

Also when quoting a common mistake made with a borgwarner turbocharger is that a K03s or a K04s are not upgraded borgwarner turbochargers, this is forum speak often referring to a hybrid turbocharger, if this is something that you require then please speak to our technical department.