The Audi CZGB is a 1,968 cc, inline — four turbo — diesel engine produced between 2010 and 2018. It forms part of the Volkswagen Group's EA288 engine family, designed for modular application across compact and mid — size platforms. Featuring common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC), it delivers 103 kW (140 PS) in standard tune, with peak torque of 320 Nm available from 1,500 rpm.
Fitted to models including the A…
Production years 2010–2014 meet Euro 5 standards; 2015–2018 models comply with Euro 6b depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Audi CZGB 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-RPM performance and improved fuel efficiency. Designed to meet Euro 5 and Euro 6 standards, it integrates advanced aftertreatment for clean operation.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline-4, DOHC, 16-valve | |
Aspiration | Turbocharged with VGT | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 103 kW (140 PS) @ 3,500–4,000 rpm | |
Torque | 320 Nm @ 1,500–3,000 rpm | |
Fuel system | Bosch CRS 2-20 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 5 (pre-2015); Euro 6b (2015–2018) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (BorgWarner KP35) | |
Timing system | Double-row roller chain (long-life design) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 168 kg |
The Audi CZGB was used across Audi's 8V/B8/C7 platforms with longitudinal mounting and shared within the Volkswagen Group for transverse and longitudinal applications. This engine received platform-specific adaptations-integrated AdBlue tank in C7 and revised EGR routing in 8V-and from 2015 the updated B8.5 facelift adopted Euro 6b-compliant tuning with enhanced SCR control, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CZGB's primary reliability risk is EGR and intake carbon buildup, with elevated incidence in urban driving. Internal Audi service data from 2016 indicated over 30% of pre-2015 units required EGR cleaning before 100,000 km, while UK DVSA records show SCR-related faults as a leading cause of Euro 6 MOT failures. Short-trip cycles and infrequent AdBlue refills increase soot and NOx accumulation, making regular maintenance and longer runs critical.
Analysis derived from Audi technical bulletins (2012-2017) and UK DVSA failure statistics (2016-2023). Repair procedures should follow manufacturer guidelines.
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The CZGB is generally robust with proper maintenance. Pre-2015 models are prone to EGR and intake carbon buildup, especially with short-trip driving. Post-2015 revisions improved EGR routing and SCR reliability. Using correct oil (VW 504 00) and regular longer runs help prevent DPF and EGR issues. With adherence to service schedules, 200,000 km+ longevity is achievable.
The most frequent issues are EGR and intake carbon buildup, AdBlue/SCR system faults, turbo actuator sticking, and HPFP wear. These are documented in Audi service bulletins. Carbon issues stem from oil vapour and EGR flow; SCR faults often result from low AdBlue. Regular inspection and correct fluid use mitigate most risks.
The CZGB was used in the Audi A3 (8V), A4 (B8/B8.5), A6 (C7), and Q5 (8R) from 2010 to 2018. It appears as 2.0 TDI or 35 TDI depending on model. All variants feature common-rail injection and VGT. From 2015, Euro 6b-compliant versions include SCR with AdBlue. It is not used in S or RS models.
Yes. The CZGB responds well to ECU remapping, with stage 1 tunes typically adding +25-35 kW. The EA288 block and internals are strong, but increased power raises exhaust temperatures. Upgraded cooling and careful tuning are recommended. Reputable tuners offer lifetime warranties. Avoid excessive tuning without supporting modifications.
In real-world conditions, expect 5.0–5.8 L/100km (49–41 mpg UK) depending on model and driving style. The A3 35 TDI achieves up to 58 mpg UK on highways. Combined figures range from 45–55 mpg UK. SCR system and DPF regeneration slightly reduce efficiency in city driving. Use of AdBlue does not affect fuel economy.
Yes. The CZGB is an interference engine. If the timing chain fails or jumps, piston-to-valve contact will occur, resulting in severe internal damage. While the double-row roller chain is designed for long life, any signs of chain wear or tensioner failure must be addressed immediately to prevent catastrophic engine failure.
The CZGB requires VW 504 00 or 507 00 specification oil (typically SAE 5W-30). This low-ash formulation is critical for DPF protection and longevity. Oil changes should be performed every 15,000 km or annually. Using non-compliant oil can lead to DPF clogging and increased maintenance costs.
Comprehensive technical documentation and regulatory references
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AUDI Official Site
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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
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