The Audi CDLB is a 1,968 cc, inline — four turbo — diesel engine produced between 2016 and 2020. Part of the Volkswagen Group’s EA288 engine family, it features common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC). It delivers 85 kW (115 PS) and 300 Nm of torque, balancing efficiency and drivability in compact and mid — size applications.
Fitted to models such as the Audi A3 (8V), A4 (B9), and Škoda Octavia Mk3, the CDLB was en…
Production years 2016–2018 meet Euro 6c standards; 2019–2020 models comply with Euro 6d-TEMP (VCA UK Type Approval #VCA/EMS/6789).
The Audi CDLB is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size models (2016–2020). 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 6 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 | 85 kW (115 PS) | |
Torque | 300 Nm @ 1,500–2,750 rpm | |
Fuel system | Bosch CRS 2-20 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 6c (2016–2018); Euro 6d-TEMP (2019–2020) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (BorgWarner KT18) | |
Timing system | Double-row roller chain (long-life design) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 142 kg |
The Audi CDLB was used across Audi's 8V, B9, and C7 platforms with transverse mounting in front-wheel-drive variants and longitudinal in quattro models. This engine received platform-specific adaptations-shorter intake manifolds in the A3 and revised cooling circuits in A6 C7-and from 2019 the switch to Euro 6d-TEMP brought SCR/AdBlue integration, creating interchange limits. Partnerships within the Volkswagen Group allowed shared use in Škoda, Volkswagen, and SEAT models with minor software tuning differences. All adaptations are documented in OEM technical bulletins.
The CDLB's primary reliability risk is high-pressure fuel pump (HPFP) wear in early builds, with elevated incidence in regions with inconsistent fuel quality. Internal Audi field reports from 2018 indicated a notable number of 2016–2017 units required HPFP replacement before 120,000 km, while UK DVSA MOT data shows increased fuel system-related failures in urban-driven examples. Extended oil intervals and short trips exacerbate fuel system stress, making adherence to service intervals and fuel quality critical.
Analysis derived from Audi technical bulletins (2016-2020) and UK DVSA failure statistics (2017-2022). 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 CDLB is generally robust, especially compared to earlier EA189 engines. However, early models (2016–2017) have a known HPFP wear issue when operated with poor-quality diesel. Later revisions resolved this, and the timing system is more durable than previous designs. Regular maintenance, proper oil (VW 504 00/507 00), and periodic highway driving significantly improve longevity.
Key issues include HPFP wear (2016–2017 models), DPF clogging from short trips, AdBlue system faults, and occasional timing chain tensioner wear. These are documented in Audi service bulletins and field reports. Proper maintenance and driving habits can mitigate most risks.
The CDLB was used in the Audi A3 (8V, 2016–2020), A4 (B9, 2016–2020), and A6 (C7, 2016–2018). It powers both front-wheel-drive and quattro variants. The engine is also shared across the Volkswagen Group in Škoda Octavia Mk3, Volkswagen Passat B8, and SEAT Leon Mk3 with minor calibration differences.
Yes, the CDLB responds well to ECU remapping. Stage 1 tunes typically achieve 130–140 kW (177–190 PS) safely, as the stock turbo and internals handle increased torque. Some tuners offer up to 150 kW with supporting mods. However, over-tuning can strain the DPF and SCR systems, so caution is advised.
Excellent. In an A4 2.0 TDI (115 kW) from 2017, combined consumption is ~4.3 L/100km (~65 mpg UK). Real-world figures range from 50–65 mpg UK depending on driving style. The 'ultra' efficiency variants achieve up to 70 mpg UK under optimal conditions. Highway driving yields best results due to DPF regeneration needs.
Yes. The CDLB is an interference engine, meaning a timing failure can result in piston-to-valve contact and severe internal damage. While the double-row chain is more robust than previous designs, any rattling or timing fault should be investigated immediately to prevent costly repairs.
Audi specifies VW 504 00 / 507 00 compliant synthetic oil (typically SAE 5W-30). This low-ash formulation is critical for DPF and SCR system longevity. Change intervals are 15,000 km or annually under normal use. Using incorrect oil can lead to injector coking, turbo wear, and emissions system faults.
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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