The Audi DZCB is a 2,967 cc, V6 twin — turbocharged diesel engine produced between 2021 and 2023. It belongs to the Volkswagen Group’s EA898 engine family, featuring common rail direct injection, a cast — iron block with an aluminium head, and a chain — driven valvetrain. In standard tune it delivers 170 kW (231 PS) with peak torque of 500 Nm available from 1,750 rpm, offering strong low — end pull ideal for high — load applications.
Fitted to models including the Audi A6 (C8), A7 (…
All DZCB models comply with Euro 6d (2021–2023) depending on market .
The Audi DZCB is a 2,967 cc V6 twin-turbocharged diesel engine engineered for longitudinal applications (2021–2023). It combines common rail injection with sequential turbocharging to deliver strong low-end torque and refined cruising. Designed to meet Euro 6d standards, it balances performance with emissions compliance in luxury all-wheel-drive platforms.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,967 cc | |
Fuel type | Diesel | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Twin-turbocharged with variable geometry turbo (VGT) | |
Bore × stroke | 83.0 mm × 95.5 mm | |
Power output | 170 kW (231 PS) @ 3,500–4,000 rpm | |
Torque | 500 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2-20 common rail (up to 2,000 bar) | |
Emissions standard | Euro 6d (2021–2023) | |
Compression ratio | 16.0:1 | |
Cooling system | Water-cooled with dual-circuit thermal management | |
Turbocharger | Sequential twin-turbo setup with low-pressure VGT and high-pressure fixed geometry | |
Timing system | Chain-driven (maintenance-free design) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 210 kg |
The Audi DZCB was used across Audi's C8/4M platforms with longitudinal mounting and shared within the Volkswagen Group for luxury applications. This engine received platform-specific adaptations-tuned throttle response in the A7 and revised cooling circuits in the Q8-and from 2022 the facelifted C8.5 revision introduced updated ECU calibration and SCR monitoring, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The DZCB is generally reliable when maintained properly, but DPF clogging is common in city-driven vehicles. Later models (post-2022) benefit from revised ECU calibration and improved regeneration logic. Regular oil changes using Audi Longlife Diesel VW 507.00 (0W-30) and periodic highway driving are essential for long-term reliability.
Key issues include DPF clogging, high-pressure fuel injector coking, EGR system fouling, and AdBlue dosing faults. These are documented in Audi technical bulletins and field reports, with preventative maintenance being critical. Urban driving exacerbates DPF and EGR issues, while poor fuel quality accelerates injector wear.
The DZCB engine was used in the Audi A6 (C8, 2021–2023), A7 (4K, 2021–2023), and Q8 (4M, 2021–2023), all in 50 TDI configuration. It was also shared across Volkswagen Group brands including the Porsche Cayenne. Applications vary by emissions standard and model year.
Aftermarket ECU tuning is common on the DZCB platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
In combined driving, the DZCB achieves approximately 6.8–7.5 L/100 km (42–38 mpg UK). Real-world consumption varies by model and driving style, with A6 and Q8 typically returning 35–40 mpg UK on mixed routes. Highway efficiency is moderate due to vehicle weight and all-wheel-drive systems.
Yes. The DZCB is an interference engine, meaning piston-to-valve contact will occur if the timing chain fails or jumps. This can result in severe internal damage. Maintaining the engine per Audi specifications, including oil changes and regeneration cycles, is critical to avoid costly repairs.
Audi specifies SAE 0W-30 oil meeting Longlife Diesel VW 507.00 specification. This low-SAPS oil is formulated to protect turbo bearings, prevent DPF ash accumulation, and support SCR system longevity. Oil changes should be performed every 15,000 km or annually, whichever comes first.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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