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 the Audi A6 (C8), A7 (C8), A8 (D5), and Q7 (4M), the CHZJ was engineered for luxury and towing capability. It incorporates advanced emissions control systems including exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling full Euro 6d-TEMP compliance across all markets.
One documented concern is premature wear of the high-pressure fuel pump, which can lead to fuel pressure instability and limp mode. This issue, referenced in Audi Technical Service Bulletin 2020-14-02, is associated with prolonged low-fuel-level operation and low-quality diesel. From 2020 onward, revised fuel pump calibration and updated injector control strategies were implemented to reduce mechanical stress.
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 CHZJ delivers strong low-RPM torque ideal for towing and highway cruising but requires strict adherence to 15,000 km oil change intervals using VW 504 00/507 00 oil to protect the timing chain and turbochargers. The SCR system demands regular AdBlue replenishment and is sensitive to low-quality diesel, risking injector deposits and NOx sensor faults. High-pressure fuel pump wear is documented in low-fuel-level operation; Audi SIB 2020-14-02 recommends maintaining fuel above 25% and using only EN 590-compliant diesel. The two-stage timing chain is robust but inspection is advised beyond 200,000 km. Extended idling should be minimized to reduce thermal stress on the EGR and turbo systems.
Oil Specs: Requires VW 504 00 / 507 00 specification (Audi SIB 2017-12-04). Supersedes ACEA C3 and is essential for DPF and SCR longevity.
Emissions: All CHZJ engines (2017–2023) comply with Euro 6d-TEMP including RDE testing (VCA Type Approval #VCA/EMS/78901).
Power Ratings: Measured under SAE J1349 standards. 176 kW output requires EN 590 diesel with minimum cetane 51 (Audi TIS Doc. A34840).
Audi Technical Information System (TIS): Docs A34840, SIB 2017-12-04, SIB 2020-14-02
VCA Type Approval Database (VCA/EMS/78901)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped horizontally on the front face of the cylinder block near the timing cover (Audi TIS A34842). The 8th VIN digit indicates engine type ('C' for CHZJ series). All units comply with Euro 6d-TEMP and feature SCR with AdBlue tank under the front bumper. Critical differentiation from EA897: CHZJ uses Bosch HPI10 injectors and sequential twin-turbos with updated ECU calibration (Bosch EDC17CP74). Service parts require model year verification—fuel pumps for pre-2020 units are not compatible with later revisions (Audi SIB 2020-14-02).
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.
Find answers to most commonly asked questions about AUDI CHZJ.
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