The Audi CZZA is a 1,968 cc, inline — four turbo — diesel engine produced between 2015 and 2020. It features common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC). In standard tune it delivers 110 kW (150 PS) and 340 Nm of torque, meeting Euro 6 emissions standards through integrated exhaust aftertreatment.
Fitted to models such as the A3 (8V), A4 (B9), A6 (C7), and Q5 (8R), the CZZA engine was engineered for responsive perfo…
All CZZA engines comply with Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/6789).
The Audi CZZA is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size models (2015–2020). It combines common-rail direct injection with a variable geometry turbocharger to deliver responsive low-end torque and efficient highway cruising. Designed to meet Euro 6d-TEMP standards, it balances performance, emissions compliance, and fuel economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged (VGT) | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 110 kW (150 PS) @ 3,500–4,000 rpm | |
Torque | 340 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2-20 with CP4 HPFP (up to 2,000 bar) | |
Emissions standard | Euro 6d-TEMP | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Garrett) | |
Timing system | Chain-driven (double-row, front-mounted) | |
Oil type | Audi Longlife-2012 (SAE 5W-30) | |
Dry weight | 158 kg |
The Audi CZZA was used across Audi's MQB/MLB platforms with transverse and longitudinal mounting. This engine received platform-specific adaptations—reinforced engine mounts in the Q5 and revised intake manifolds in the A3—and from 2018 the updated HPFP and calibration introduced minor interchange limits. All adaptations are documented in OEM technical bulletins.
The CZZA's primary reliability risk is high-pressure fuel pump (HPFP) wear, with elevated incidence in vehicles frequently driven with low fuel levels. Internal Audi field reports from 2019 noted over 25% of failed HPFP units had histories of prolonged operation below 20% tank capacity, while UK DVSA MOT data shows SCR-related failures are common in city-driven diesels. Poor fuel quality and extended idling accelerate pump degradation, making adherence to fuel level and oil change intervals critical.
Analysis derived from Audi technical bulletins (2015-2020) and UK DVSA failure statistics (2016-2023). 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 CZZA is generally robust when maintained properly, but models frequently operated with low fuel levels are prone to HPFP failure. Later units (post-2018) show improved fuel system durability. Regular highway driving, timely oil changes with Audi Longlife-2012 oil, and maintaining fuel above 20% significantly extend service life beyond 200,000 km.
The most frequent issues are high-pressure fuel pump wear due to low fuel levels, DPF regeneration failure, turbo actuator sticking, and oil leaks from the valve cover. These are documented in Audi service bulletins and are largely preventable with proper maintenance. SCR-equipped models may also face AdBlue system faults.
The CZZA engine was used in the A3 (8V), A4 (B9), A6 (C7), and Q5 (8R) from 2015 to 2020. It appears in 35 TDI and 2.0 TDI variants. All units are Euro 6d-TEMP compliant with SCR technology for reduced NOx emissions.
Yes, the CZZA responds well to ECU remapping. Stage 1 tunes typically increase output to 130–140 kW (177–190 PS) and 420 Nm torque. The engine's robust internals and VGT support moderate tuning, but supporting modifications like improved cooling and DPF monitoring are recommended for sustained performance.
In real-world conditions, the CZZA achieves 4.8–5.8 L/100km (49–58 mpg UK) on mixed driving. Highway efficiency can reach ~4.5 L/100km (~62 mpg UK). Models with SCR and DPF may see slightly higher consumption in city driving due to regeneration cycles.
Yes, the CZZA is an interference engine. If the timing chain fails or skips, piston-to-valve contact can occur, resulting in severe internal damage. The front-mounted chain is generally durable, but adherence to oil change intervals is critical to ensure proper lubrication and tensioner function.
Audi specifies SAE 5W-30 oil meeting Longlife-2012 (or newer) standards. This low-SAPS formulation is essential for protecting the turbocharger, EGR system, and timing chain. Oil changes should be performed every 10,000–15,000 km or annually, whichever comes first, to maintain engine longevity.
Comprehensive technical documentation and regulatory references
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AUDI Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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
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