BorgWarner K03S Turbocharger Assembly - Fit Volkswagen Audi 1.8T 2.0T Engine Original Number 53039700053 06A145703B 06H145702L
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| Turbo Model | K03 / K03S (KKK/BorgWarner Standard Model Code) |
| Compressor Wheel Specification | K03: 38/51 mm; K03S: 40/51 mm or 42/51 mm (depending on part number) |
| Turbo Wheel Specification | 40/45 mm (Standard K03/K03S Common Turbine End) |
| Exhaust Bypass Valve Type | Built-in Pneumatic Actuator (Early) / Electronic Actuator (Late 2.0T FSI/TSI) |
| Actuator Spring Pressure | Approximately 0.4 - 0.65 bar (with various specifications such as 65N/80N, corresponding to the engine ECU calibration required) |
| Cooling Type | Water-cooled + Oil-cooled (dual circulation bearing housing) |
| Intake Flange | Standard VAG 1.8T/2.0T Intake Manifold Flange (5 Bolts/Clamp) |
| Exhaust Flange | K03/K03S Special Standard 4-bolt triangular flange (Different from K04 flange, please note the distinction) |
| Bearing System | Full floating bearing (Journal Bearing) |
| Rotation Direction | Clockwise (CW) when viewed from the compressor end |
| Core Material | Compressor Wheel: Aluminum Alloy (A356/T6); Turbine Wheel: Inconel 713C / Martensitic Stainless Steel; Bearing Housing: Graphite Cast Iron |
Manufacturer No.
5303970005353039700181530397001185303970016353039880290530398802915303100907853049500001K03-011K03-027K03-044K03-055
OEM Part No.
06A145703B06A145704S06A145713D06H145702L06H145702S06B145703B282312B700
Engine Part No.
AEBAPHAUMAWMBAMBPYBWACAEBCAEDCBFACCTACCZAG4FJOM611
Interchange No.
K03SK03 SportK04-001K04-015GT1852VGTA1582VTD04TD05 20G530397000959VA03
Fitment Vehicles
Volkswagen Golf IV/V/VIVolkswagen Jetta/BoraVolkswagen Passat B5/B6Volkswagen BeetleVolkswagen SciroccoAudi A3 8L/8PAudi A4 B6/B7/B8Audi A5Audi A6 C5/C6Audi TT MK1/MK2Audi Q5Skoda Octavia 1U/1ZSkoda SuperbSEAT Leon 1M/1PSEAT ToledoHyundai Veloster 1.6TKia Forte 1.6TMercedes-Benz OM611 Diesel Engine
Exhaust and Intake System - Industrial Encyclopedia
BorgWarner K03S turbocharger is specifically designed for Volkswagen Group 1.8T and 2.0T FSI/TSI engines, widely compatible with models such as Golf, Jetta, Passat, Beetle, Audi A3, A4, TT, Seat Leon, etc. Core interchange numbers include 53039700053, 53039880290, 06A145703B, 06H145702L, etc. Compressor specifications are 38/51mm or 40/51mm, turbine end 40/45mm, integrated electronic/pneumatic exhaust bypass valve actuator, water-cooled oil-cooled dual circulation bearing system, meets OE direct fit replacement standards.