BorgWarner Turbo Systems

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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:-

Borgwarner Turbocharger, K04-48Borgwarner Turbocharger, K04-64

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.

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 borg warner 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 idenify it that way.

As stated above when quoting a partnumber 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 refering to a hybrid turbocharger, if this is something that you require then please speak to our technical department.