The Audi CZGA is a 1,968 cc, inline — four turbo — diesel engine produced between 2010 and 2018. It features common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC). In standard tune it delivers 103 kW (140 PS) and 320 Nm of torque, with later revisions achieving improved emissions compliance and throttle response.
Fitted to models such as the A3 (8V), A4 (B8), A6 (C7), and Q5 (8R), the CZGA engine was engineered for balanced pe…
Production years 2010–2015 meet Euro 5 standards; 2016–2018 models comply with Euro 6 depending on market .
The Audi CZGA is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size models (2010–2018). 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 5 and later Euro 6 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 | 103 kW (140 PS) @ 3,500–4,000 rpm | |
Torque | 320 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CRS 2-20 (up to 1,800 bar) | |
Emissions standard | Euro 5 (pre-2015); Euro 6 (2016–2018) | |
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 | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 158 kg |
The Audi CZGA 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 2016 the Euro 6 update introduced SCR technology in select markets, 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 CZGA is generally robust when maintained properly, but models used primarily in urban environments are prone to EGR and DPF issues. Later Euro 6 versions (post-2016) show improved emissions system durability. Regular highway driving, timely oil changes with Audi Longlife-2012 oil, and periodic EGR cleaning significantly extend service life beyond 200,000 km.
The most frequent issues are EGR and intake carbon buildup, 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 CZGA engine was used in the A3 (8V), A4 (B8), A6 (C7), and Q5 (8R) from 2010 to 2018. It appears in 35 TDI and 2.0 TDI variants. Euro 5 models were produced until 2015; Euro 6 versions from 2016 onward include SCR technology in select markets for reduced NOx emissions.
Aftermarket ECU tuning is common on the CZGA 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 real-world conditions, the CZGA achieves 4.5–5.5 L/100km (52–64 mpg UK) on mixed driving. Highway efficiency can reach ~4.2 L/100km (~67 mpg UK). Models with SCR and DPF may see slightly higher consumption in city driving due to regeneration cycles.
Yes, the CZGA 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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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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