ELECTRIC MOTOR AUDI Q7 3.0 TDI V6 24V e-tron hybrid code UDU

Transmission Integration: 8-speed Tiptronic (0D7)

Application: Audi Q7 e-tron Quattro (2016–2019)

Engine Pairing: 3.0 TDI V6 (Code CVZA)

The UDU refers to the high-voltage electric propulsion motor found in the pioneering Audi Q7 3.0 TDI e-tron. Unlike smaller hybrids, this motor is a permanent-magnet synchronous machine integrated directly into the housing of the 8-speed automatic transmission. It sits between the V6 diesel engine and the gearbox, acting as both a traction motor and a powerful generator for energy recuperation.

Technical Specifications

• Peak Output: $94\text{ kW}$ (approx. $128\text{ PS}$).

• Peak Torque: $350\text{ Nm}$ (available from $0\text{ RPM}$).

• System Total (with V6 TDI): $275\text{ kW}$ ($373\text{ PS}$) and $700\text{ Nm}$ of torque.

• Cooling: Integrated liquid-cooling circuit shared with the power electronics (PE).

• Location: Positioned behind the K0 decoupling clutch, allowing the car to drive on electricity alone while the diesel engine is completely stationary.

Key Performance Features

• EV Driving: Enables a pure electric range of up to $56\text{ km}$ (NEDC) and a top electric speed of $135\text{ km/h}$.

• Recuperation: Acting as a generator, the UDU motor can recover up to $60\text{ kW}$ of energy during braking, feeding it back into the $17.3\text{ kWh}$ lithium-ion battery.

• Boost Mode: When the accelerator is depressed past the “kick-down” point, the UDU motor combines its $350\text{ Nm}$ with the V6’s $600\text{ Nm}$ for massive low-end pulling power.

Professional Installation & Safety

Warning: This component is a High-Voltage (HV) part operating at over $300\text{V}$. Work should only be performed by “Level 2” or higher certified HV technicians.

1. De-energizing the Vehicle: Before attempting to access or replace the motor/transmission assembly, the HV system must be deactivated via the Emergency Disconnect (usually a red pull-tab connector located in the engine bay near the plenum chamber).

2. The K0 Clutch: The UDU motor is paired with a specific K0 decoupling clutch. If you are replacing the motor, ensure the clutch friction disc is inspected; if this clutch fails, the diesel engine cannot “hand over” power to the transmission.

3. Thermal Management: The UDU motor relies on a dedicated low-temperature cooling loop. After installation, this circuit must be bled using a diagnostic vacuum-fill routine to prevent the motor from “derating” (reducing power) due to air pockets.

4. Adaptation: After installation, the “Transmission Control Module” (J217) and the “Power Electronics” (J1050) require a basic setting procedure to calibrate the motor’s rotor position sensor.

Component Overview

Inventory Note: The UDU motor is typically sold as part of the complete 0D7 transmission assembly, but it can be serviced as a separate internal component in specialized repair environments.