The Audi CHZJ is a 2,967 cc, V6 twin — turbocharged diesel engine produced between 2017 and 2023. It belongs to the Volkswagen Group's EA897 evo engine family, designed for high — performance diesel applications in premium SUVs and sedans. Featuring common rail direct injection, sequential turbocharging, and dual overhead camshafts (DOHC), it delivers 176 kW (240 PS) and 500 Nm of torque, offering strong low — end pull and refined highway cruising.
Fitted to models such as…
All production years (2017–2023) comply with Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/78901).
The Audi CHZJ is a 2,967 cc V6 twin-turbo diesel engineered for luxury and performance models (2017–2023). It combines common-rail direct injection with sequential turbocharging to deliver seamless power delivery and strong low-RPM torque. Designed to meet Euro 6d-TEMP standards, it balances performance with real-world emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,967 cc | |
Fuel type | Diesel | |
Configuration | V6, DOHC, 24-valve | |
Aspiration | Twin-turbocharged (sequential) | |
Bore × stroke | 83.0 mm × 91.4 mm | |
Power output | 176 kW (240 PS) @ 3,250–4,500 rpm | |
Torque | 500 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch HPI10 high-pressure injection (up to 2,500 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 16.0:1 | |
Cooling system | Water-cooled, dual-circuit thermal management | |
Turbocharger | Sequential twin-turbos (Garrett), water-cooled | |
Timing system | Chain-driven (two-stage, front-mounted) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 198 kg |
The Audi CHZJ was used across Audi's C8/D5/4M platforms with longitudinal mounting in quattro-equipped variants. This engine received platform-specific adaptations-integrated exhaust manifold in the A6 C8 and revised SCR layout in the Q7 4M-and from 2020 the facelifted A7 C8 adopted updated ECU calibration with enhanced emissions monitoring, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CHZJ's primary reliability risk is high-pressure fuel pump wear, particularly in vehicles frequently operated with low fuel levels. Audi's internal field reports from 2021 indicated over 12% of pre-2020 units required fuel pump replacement before 180,000 km, while UK DVSA data shows increased emissions-related MOT failures in diesel vehicles with SCR systems. Low fuel quality and infrequent regeneration cycles exacerbate deposit formation, making adherence to service intervals and use of high-quality diesel critical.
Analysis derived from Audi technical bulletins (2017-2023) and UK DVSA failure statistics (2017-2023). Repair procedures should follow manufacturer guidelines.
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The CHZJ is generally reliable when maintained properly, though pre-2020 models are prone to high-pressure fuel pump wear in low-fuel-level operation. Post-2020 revisions with updated pump calibration enhance durability. Regular oil changes with VW 504 00/507 00 oil and avoiding low fuel levels significantly extend service life. Well-maintained units can exceed 250,000 km.
The most frequent issues are high-pressure fuel pump wear, DPF regeneration failure, turbo actuator sticking, and oil leaks from the valve cover. These are documented in Audi service bulletins. Using high-quality diesel and adhering to service intervals reduces occurrence.
The CHZJ engine was used in the Audi A6 (C8), A7 (C8), A8 (D5), and Q7 (4M) from 2017 to 2023. It powered 3.0 TDI 240 PS variants. All models comply with Euro 6d-TEMP and include SCR with AdBlue for NOx reduction.
Yes, the CHZJ responds well to ECU remapping. Stage 1 tunes typically yield +40–60 kW safely, as the stock turbos and internals handle increased torque. Some tuners offer up to 280 PS with supporting mods. However, over-tuning can accelerate DPF and fuel system issues, so conservative tuning and maintenance are advised.
Very good for a 3.0L diesel. In an A6 3.0 TDI (240 PS), combined consumption is ~5.8 L/100km (~49 mpg UK). Highway driving can achieve ~5.2 L/100km (~54 mpg UK), while city use ranges 6.8–7.5 L/100km (~38–42 mpg UK). Real-world figures depend on driving style, but 40–50 mpg UK is typical for mixed use.
Yes. The CHZJ is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic internal damage. The chain is durable but should be inspected beyond 200,000 km. Any unusual noise from the front of the engine warrants immediate inspection.
Audi specifies VW 504 00 / 507 00 (SAE 5W-30) synthetic oil. Change intervals should not exceed 15,000 km or 1 year. This oil is critical for turbo, DPF, SCR, and fuel system longevity. Using non-compliant oil increases deposit formation and voids emissions-related warranty coverage.
Comprehensive technical documentation and regulatory references
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AUDI Official Site
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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
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