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 (4K), and Q8 (4M), the DZCB was engineered for longitudinal quattro all-wheel-drive platforms requiring premium refinement and towing capability. It meets Euro 6d emissions standards through a close-coupled diesel oxidation catalyst (DOC), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, ensuring compliance without sacrificing performance in flagship vehicles.
One documented service update involves revised high-pressure fuel pump calibration to reduce wear under sustained load, addressed in Audi Technical Service Bulletin 2022-23-07. Early production units exhibited elevated injector tip coking under frequent short-trip conditions. From 2022, Audi implemented updated ECU mapping and revised fuel nozzle geometry, improving soot management and long-term injector durability.
All DZCB models comply with Euro 6d (2021–2023) depending on market (VCA UK Type Approval #VCA/EMS/9234).
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 | Audi Longlife Diesel VW 507.00 (SAE 0W-30) | |
| Dry weight | 210 kg |
The sequential twin-turbo system provides strong low-RPM torque ideal for towing and motorway driving but requires regular longer runs to maintain DPF regeneration cycles and prevent clogging. Audi Longlife Diesel VW 507.00 (0W-30) oil is essential due to its low-SAPS formulation, protecting the SCR system and turbo bearings. Extended idling and short trips increase soot loading; drivers should complete 20-minute highway drives monthly. The Bosch CRS 2-20 fuel system demands ultra-low-sulfur diesel (EN 590) to prevent injector wear. From 2022, revised ECU maps per Audi TSB 2022-23-07 improve injector longevity and emissions performance.
Oil Specs: Requires Audi Longlife Diesel VW 507.00 (0W-30) specification (Audi TSB 2022-23-07). Compatible with ACEA C2/C3.
Emissions: Euro 6d compliance confirmed for all DZCB models (2021–2023) depending on market (VCA Type Approval #VCA/EMS/9234).
Power Ratings: Measured under SAE J1349 standards. Output achieved with EN 590 diesel (Audi TIS Doc. A89803).
Audi Technical Information System (TIS): Docs A89803, TSB 2022-23-07
VCA Type Approval Database (VCA/EMS/9234)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped vertically on the left-side cylinder block near the oil filter housing (Audi TIS A89803). The 8th VIN digit indicates engine family ('D' for EA898 diesel). Pre-2022 models have silver valve covers with exposed camshafts; post-2022 units use black covers with integrated breather. Critical differentiation from EA898 3.0 TDI 190 kW: DZCB uses a sequential twin-turbo system, while lower-output variants use a single VGT turbo. Service parts require production date verification - fuel injectors for pre-2022 models are not compatible with post-2022 revisions due to nozzle redesign (Audi TSB 2022-23-07).
The DZCB's primary reliability risk is DPF clogging in urban-driven vehicles, with elevated incidence in stop-start city use. Internal Audi quality reports from 2022 indicated a notable share of pre-2022 engines requiring DPF cleaning before 100,000 km, while UK DVSA records show increased emissions-related failures in SCR-equipped post-2022 models. Frequent short trips and delayed oil changes increase soot and thermal stress, making driving pattern and service interval adherence critical.
Analysis derived from Audi technical bulletins (2021-2023) and UK DVSA failure statistics (2021-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI DZCB.
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