steering gear for VW Passat B8, VW Arteon 3Q1423053T
Part Number: 3Q1.423.053.T
Model Family: MQB Platform (Gen 3)
Application: VW Passat B8 (2015–2023), VW Arteon (2017–Present)
Type: Electric Power Steering (EPS) / Rack and Pinion
The 3Q1.423.053.T is a high-precision, electrically assisted steering rack. Unlike older hydraulic systems, this unit features a motor mounted directly to the steering gear, which communicates via the vehicle's CAN-bus system to adjust steering weight and responsiveness based on speed and driving mode (e.g., Eco, Comfort, Sport).
Technical Specifications
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Operating Mode: Electric (No hydraulic fluid required).
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Drive Configuration: Designed for Left-Hand Drive (LHD) vehicles.
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Control Module: Integrated ECU (Part of the "Power Steering" J500 module).
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Communication: Fully integrated with Lane Assist and Park Assist systems. The rack can actively steer the car during semi-autonomous driving functions.
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Material: Lightweight cast aluminum housing for the main gear set.
Compatibility & Cross-Reference
The 3Q1.423.053.T is interchangeable with several other revision codes from the Volkswagen Group (VAG), but the suffix "T" is one of the more recent updates, often found in facelift or high-spec models.
| Shared Platform Models | Alternative Part Suffixes |
| Skoda Superb III (3V) | 3Q1.423.053.G / L / M |
| Audi A3 (8V) | 5Q1.423.051.xx (similar MQB architecture) |
| Seat Leon (5F) | 5Q1.423.053.xx |
Installation & Calibration Notes
Important: Because this is an intelligent electronic component, a physical swap is only half the job.
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Software Adaptation: After installation, the rack must be "flashed" with the correct steering curve for your specific vehicle weight and wheelbase using a diagnostic tool like ODIS or VCDS.
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Basic Settings: You must perform a "Basic Setting" for the Steering Angle Sensor (G85) and the end-stops. Without this, the power assistance may not activate, and the dashboard will show a yellow or red steering wheel warning light.
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Torque Specs: The steering rack mounting bolts are "stretch bolts" (one-time use). Always replace them and torque to $50\text{ Nm} + 90^\circ$ (check your specific year for variations).
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Hardware: This unit is typically sold without tie rods or bellows. Ensure you transfer or replace the inner and outer tie rods during the swap.
Professional Tip
If your original rack failed due to water ingress (a known issue if the rubber boots/bellows tear), check the electrical connector for corrosion. Even a brand-new rack will fail if the wiring harness plug is oxidized. Use a contact cleaner and dielectric grease during reassembly to ensure a weatherproof seal.