The Audi CDYC is a 1,968 cc, inline — four turbo — diesel engine produced between 2010 and 2018. It forms part of the Volkswagen Group's EA288 diesel engine family, designed for efficiency and durability 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) and 320 Nm of torque, with enhanced thermal management for improved cold — start perform…
Production years 2010–2014 meet Euro 5 standards; 2015–2018 models comply with Euro 6d-TEMP depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Audi CDYC is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size passenger vehicles (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 Euro 6d-TEMP emissions standards, it balances performance with regulatory compliance.
| 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 @ 1,750–2,750 rpm | |
Fuel system | Bosch CRS 2-20 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 5 (pre-2015); Euro 6d-TEMP (2015–2018) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single VGT (Garrett GT1544V) | |
Timing system | Double-row roller chain (long-life, non-serviceable) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 145 kg |
The Audi CDYC 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-shorter intake manifolds in the A3 and revised EGR routing in the A6-and from 2015 the facelifted A4 B8.5 adopted Euro 6d-TEMP compliance with SCR integration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CDYC's primary reliability risk is high-pressure fuel pump (HPFP) failure, with elevated incidence in urban-driven vehicles with frequent short trips. Internal Audi field reports from 2016 indicated a measurable increase in HPFP replacements on units with inconsistent fuel levels, while UK DVSA data shows EGR cooler failures contributing to emissions-related MOT failures. Extended oil intervals and low tank levels exacerbate fuel system stress, making adherence to VW 504 00 oil and tank management critical.
Analysis derived from Audi technical bulletins (2012-2017) and UK DVSA failure statistics (2016-2022). Repair procedures should follow manufacturer guidelines.
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The CDYC is generally robust when maintained properly, but models from 2010–2014 show higher rates of EGR cooler and HPFP issues. Post-2015 revisions with improved coolers and SCR integration are more durable. Using high-quality diesel, maintaining fuel levels above 1/4 tank, and adhering to oil service intervals (15,000 km max) significantly improve longevity.
Key issues include high-pressure fuel pump failure due to low fuel levels, EGR cooler corrosion leading to coolant leaks, and carbon buildup in the EGR valve and intake. Less commonly, timing chain tensioner wear has been reported. These are documented in Audi service bulletins and field reports.
The CDYC was used in the Audi A3 (8V, 2013–2018), A4 (B8, 2010–2015), and A6 (C7, 2011–2018) as the 2.0 TDI 140 PS. It was also shared across Volkswagen Group models including the Passat B7 and Škoda Superb. Pre-2015 units meet Euro 5; 2015+ models comply with Euro 6d-TEMP using AdBlue.
Yes. The CDYC responds well to ECU remapping, with stage 1 tunes typically achieving 170–185 PS safely. The stock turbo and internals handle moderate increases, but supporting mods like upgraded intercoolers and exhausts are recommended for higher power. Tuning should preserve DPF and EGR functionality to avoid reliability issues.
In real-world driving, the CDYC achieves 4.2–5.0 L/100km (67–56 mpg UK) depending on model and driving style. The A3 35 TDI averages ~4.5 L/100km (63 mpg UK) combined. Highway efficiency is excellent, while city driving may approach 5.5 L/100km due to DPF regeneration cycles.
Yes. The CDYC is an interference engine, meaning a timing failure can result in piston-to-valve contact and severe internal damage. Although the chain is designed for the life of the engine, tensioner wear or oil starvation can compromise timing integrity. Immediate attention to cold-start rattles is essential.
Audi specifies SAE 5W-30 oil meeting VW 504 00 (for petrol engines) or VW 507 00 (diesel-specific) standards. Using non-compliant oil increases DPF clogging and turbo wear risk. Oil changes should not exceed 15,000 km or 1 year, whichever comes first, to maintain aftertreatment system health.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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