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 performance, fuel economy, and low-end torque. Emissions compliance was achieved via exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) in certain markets, meeting Euro 5 standards through 2015 and Euro 6 for later builds.
One documented concern is EGR and intake manifold carbon buildup, particularly in urban-driven vehicles with frequent short trips. This issue, referenced in Audi Service Bulletin 2014-15-01, results from soot accumulation due to high EGR rates and cooler combustion temperatures. From 2015 onward, revised EGR cooling and software calibration reduced deposit formation in Euro 6-compliant variants.
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 VGT turbo provides strong low-RPM torque ideal for city driving but requires regular highway runs to prevent DPF saturation and EGR clogging. Audi Longlife-2012 (5W-30) oil is essential to maintain timing chain lubrication and reduce sludge formation. Short-trip driving exacerbates carbon buildup in the intake and EGR system, necessitating periodic cleaning. SCR-equipped models require AdBlue top-ups every 10,000–12,000 km. Post-2015 Euro 6 variants feature revised EGR coolers and calibration, improving reliability in stop-start conditions.
Oil Specs: Requires Audi Longlife-2012 (5W-30) specification (Audi SIB 10 11 16). Supersedes ACEA C3 standards.
Emissions: Euro 5 certification applies to pre-2015 models only (VCA Type Approval #VCA/EMS/5678). Euro 6 compliance confirmed for UK market 2016–2018 models.
Power Ratings: Measured under SAE J1349 standards. Output maintained across fuel qualities due to closed-loop ECU control (Audi TIS Doc. A35890).
Audi Technical Information System (TIS): Docs A35120, A35401, SIB 10 11 16
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped horizontally on the front of the cylinder block near the timing cover (Audi TIS A35180). The 7th VIN digit indicates engine family ('C' for CZGA). Pre-2015 models have silver valve covers with exposed EGR piping; post-2016 SCR-equipped units include a urea dosing module and blue AdBlue cap. Critical differentiation from EA288: CZGA uses a single VGT turbo and lacks dual-loop EGR. Service parts require model-year verification—EGR valves and DPFs are not interchangeable between Euro 5 and Euro 6 variants (Audi SIB 12 05 13).
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.
Find answers to most commonly asked questions about AUDI CZGA.
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Regulation (EC) No 715/2007
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