BorgWarner K03S Turbocharger Core Assembly CHRA for Volkswagen 1.8T and Some Audi 2.0T Engines
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| Turbo Frame Model | K03 / K03S (K03 Sport) |
| Bearing Type | Floating bearing (Journal Bearing) |
| Cooling Type | Oil Cooling and Water Cooling |
| Compressor Blade Diameter | Approx. 49 mm (K03S is about 5 mm larger than K03) |
| Turbo End Configuration | Original exhaust bypass valve actuator |
| Applicable Engine Displacement | 1.8L Turbocharged / 2.0L TFSI |
| Original Horsepower Range | 180 - 200 hp |
| Replacement Method | Direct replacement, note the difference in actuator |
Manufacturer No.
53037100511530371005265303988046953037110000BWA53037110000
OEM Part No.
058145703J06F145701H06A145704S06A145713F06A145713B
Engine Part No.
EA113 1.8T 20V2.0 TFSIAGUAWPAUQB5
Interchange No.
K03-029K03-052058145703JKTK03SK04
Fitment Vehicles
Volkswagen BoraVolkswagen LavidaVolkswagen TouranVolkswagen Golf IVVolkswagen PassatVolkswagen JettaVolkswagen BeetleAudi A3Audi A4 B7Audi TTSEAT LeonSkoda Octavia
Exhaust and Intake System - Industrial Encyclopedia
Original and OEM specification BorgWarner K03 and K03S turbocharger core assembly (CHRA), suitable for Volkswagen Group EA113 1.8T 20V engine. Covers common replacement numbers 53037100511, 53037100526, 058145703J, 06A145704S, etc. The turbocharger core uses a high-temperature alloy turbine and precision bearing design, supporting original 180-200 horsepower output. Compatible models include Volkswagen Bora 1.8T, Sagitar 1.8T, Touran 1.8T, Audi A4 2.0 TFSI, Golf IV, and Passat, etc. In stock, offering new and OEM remanufacturing solutions, it is the ideal core component for turbo repair and upgrade.