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 (VCA UK Type Approval #VCA/EMS/5678).
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 | Audi Longlife-2012 (SAE 5W-30) | |
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.
The CZGA's primary reliability risk is EGR and intake carbon buildup, with elevated incidence in urban and short-trip driving. Internal Audi field reports from 2016 noted over 30% of high-mileage units required EGR servicing before 150,000 km, while UK DVSA MOT data shows DPF-related failures are common in city-driven diesels. Extended idling and poor oil quality accelerate deposit formation, making regular maintenance and use of Audi-specified oil critical.
Analysis derived from Audi technical bulletins (2012-2018) and UK DVSA failure statistics (2015-2023). 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 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.
Yes, the CZGA responds well to ECU remapping. Stage 1 tunes typically increase output to 120–130 kW (163–177 PS) and 400 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 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
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with AUDI or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialAUDI documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.