Original Quality K03/K03S Turbocharger for Volkswagen Bora 1.8T/Touran 1.8T/Sagitar 1.8T, Made by Bosch Mahle
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| Turbo Model | K03 / K03s |
| Applicable Engine Displacement | 1.8 liter (1798cc) |
| Cylinders | 4-Cylinder |
| Engine Series | EA113 / EA888 1.8T |
| Compressor Blade Diameter | 46/42 mm |
| Compressor Blade Count | 12 pieces |
| Intake Flange Type | 3 Bolt Flange |
| Exhaust Flange Type | 3 Bolt Flange |
| Turbo End Type | Wastegate type |
| Bearing Type | Floating Journal Bearing |
| Cooling Type | Water Cooling + Oil Cooling |
| Brand | Bosch Mahle / BorgWarner / KKK |
| Origin Country | Canada |
| Applicable Year Range | 1996-2006（K03） / 2000-2006（K03s） |
| Power Increase Potential | Original factory rating of approximately 150 hp, Stage 1 up to approximately 200 hp, Stage 2 up to approximately 220 hp |
Manufacturer No.
BOSCH_K0353039880029058145703E06J145701G1900-100-025
OEM Part No.
06J145701G058145703E
Engine Part No.
1.8T1.8 TFSIAEBATWAWMAUGAPUAWTAWPAWWAMUBAM
Interchange No.
530398800291900-100-025K03K03sK04
Fitment Vehicles
Volkswagen Bora 1.8TVolkswagen Touran 1.8TVolkswagen Sagitar 1.8TVolkswagen Passat B5 1.8TAudi A4 B6/B7 1.8TAudi A3 8P 1.8 TFSIAudi TT 8J 1.8 TFSISkoda Octavia 1.8TSEAT Leon 1.8T
Exhaust and Intake System - Industrial Encyclopedia
This page offers the original equipment quality Bosch Mahle K03/K03S turbocharger, specifically designed for the Volkswagen Audi Group (VAG) 1.8T engine. Compatible models include Volkswagen Bora, Touran, Sagitar, Passat B5, and Audi A4 (B6/B7). It covers engine codes AEB, ATW, AWM, AUG, APU, AWT, etc. The K03 turbocharger features a lightweight design and optimized blade aerodynamics, which can significantly enhance engine power and torque, and improve throttle response. Interchangeable part numbers include 53039880029, 058145703E, 06J145701G. Standard configuration is the Valen (K03) or the upgraded version (K03s), which boasts excellent low-end torque performance and is an ideal choice for original equipment replacement or performance recovery for the 1.8T engine.