Air and Fuel› Superchargers, Turbochargers and Components

NEW

K03 Turbocharger

$513.34

SKU: 058145703J

Special Order
Special Order
Ships in 4–6 weeks
Free Shipping over $200
$100 Minimum Order
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Overview

The BorgWarner K03 turbocharger is an OE-standard replacement component designed for 1.8T engines. This unit serves as a direct fit for various Audi, Volkswagen, Seat, and Skoda models featuring the K03 turbo configuration.
Show original supplier description
The BorgWarner K03 turbocharger is an OEM-standard replacement unit engineered to restore factory performance levels in 1.8T engine applications. Designed with precision, this turbocharger features high-grade materials, water-cooled bearing casings, and milled impeller wheels to ensure reliable operation and consistent boost delivery. This component is specifically compatible with a wide range of longitudinal 1.8T platforms, including the Audi A4, A4 Quattro, Audi A6, and Volkswagen Passat. It serves as a direct-fit replacement for original units designated by part number 058145703J and related alternates. Please verify your engine code and specific vehicle chassis to ensure compatibility, as this unit is tailored for 1.8T engines found in select VW, Audi, Seat, and Skoda configurations.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandNEW
Part Number058145703J
CategoryAir and Fuel
5,000+ Trusted brands
1M+ Enthusiasts
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(760) 282-4645 hello@motormia.co

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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

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