The Audi CFHB is a 1,968 cc, inline — four turbo — diesel engine produced between 2015 and 2020. It belongs to the Volkswagen Group's EA288 engine family, designed for high efficiency and Euro 6 compliance. Featuring common rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC), it delivers 110 kW (150 PS) and 340 Nm of torque, with enhanced thermal management and integrated cylinder head for improved cooling.
Fitted to models in…
Production years 2015–2018 meet Euro 6c standards; 2018–2020 models comply with Euro 6d-TEMP depending on market (VCA UK Type Approval #VCA/EMS/6789).
The Audi CFHB is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size passenger vehicles (2015–2020). 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 6c 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 | 110 kW (150 PS) @ 3,250–4,200 rpm | |
Torque | 340 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2-20 common-rail (up to 2,000 bar) | |
Emissions standard | Euro 6c (2015–2018); Euro 6d-TEMP (2018–2020) | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled with integrated exhaust manifold | |
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 CFHB was used across Audi's B9/C7 platforms with longitudinal mounting and shared within the Volkswagen Group for transverse and longitudinal applications. This engine received platform-specific adaptations-integrated exhaust manifold in the A4 B9 and revised EGR routing in the A6 C7-and from 2018 the facelifted A5 B9.5 adopted Euro 6d-TEMP compliance with SCR integration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The CFHB'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 2017 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 (2015-2018) and UK DVSA failure statistics (2017-2023). Repair procedures should follow manufacturer guidelines.
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The CFHB is generally robust when maintained properly, but models from 2015–2018 show higher rates of EGR cooler and HPFP issues. Post-2018 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 CFHB was used in the Audi A4 (B9, 2015–2020), A5 (B9, 2016–2020), and A6 (C7, 2015–2018) as the 2.0 TDI 150 PS. It was also shared across Volkswagen Group models including the Passat B8 and Škoda Superb. All units meet Euro 6c; 2018+ models comply with Euro 6d-TEMP using AdBlue.
Yes. The CFHB responds well to ECU remapping, with stage 1 tunes typically achieving 180–195 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 CFHB achieves 4.1–4.9 L/100km (69–58 mpg UK) depending on model and driving style. The A4 2.0 TDI averages ~4.4 L/100km (64 mpg UK) combined. Highway efficiency is excellent, while city driving may approach 5.4 L/100km due to DPF regeneration cycles.
Yes. The CFHB 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
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
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