The BorgWarner K04-015 turbocharger is a popular upgrade for 1.8T engines, offering more power and improved reliability over the standard turbocharger. Thanks to the larger compressor and improved airflow, power can be increased to approximately 240 hp with the right modifications. The turbocharger is oil- and water-cooled and fits 1:1 on the original mounting points.
Advantages
• Original BorgWarner K04-015 turbo
• Larger compressor for better airflow
• Direct replacement of the OEM turbo
• Oil and water cooled system
• Reliable plain bearing construction
• Suitable for performance upgrades up to approx. 240 hp
Technical specifications
• Turbo type: K04-015
• Compressor wheel: 49.5 / 37.5 mm
• Turbine wheel: 46 / 42 mm
• Bearing type: plain bearing
• Cooling: oil and water
• Fitment: OEM 1:1 replacement
Compatibility
Audi A4 1.8T
• Engine codes: AEB, APU, ARK, ANB, AJL, BFB, BEX, AVJ
Audi A6 1.8T
• Engine codes: AEB, APU, ARK, ANB, AJL, AWT
VW Passat 1.8T
• Engine codes: AEB, APU, ARK, ANB, AWT
Also suitable for small turbo conversions up to 1.8L engines, such as:
• VW G40 projects
• Fiat Punto Turbo
• Fiat Uno Turbo
Recommended upgrades for maximum performance
• Air Intake system
• 380cc injectors
• Larger intercooler
• Upgrade manifold
• 200-cell sports catalyst
• Downpipe and exhaust system minimum 63.5 mm
• ECU tuning
Contents
• BorgWarner K04-015 turbocharger
Frequently Asked Questions
Is this turbo a direct replacement for the original turbo?
Yes, this turbo fits 1:1 on the original mounting points.
What is the maximum power with this turbo?
Up to about 240 hp with the right upgrades and software.
Is tuning necessary?
Yes, a software adjustment is required to make optimal use of the larger turbo.
