The Audi CFSA 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 improved efficiency and emissions compliance over its predecessors. 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 integrated start — stop and brake energy recuperation systems enhan…
All production years (2015–2020) comply with Euro 6b standards (VCA UK Type Approval #VCA/EMS/6789).
The Audi CFSA is a 1,968 cc inline-four turbo-diesel engineered for compact and mid-size SUVs (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 6b standards, it balances emissions compliance with real-world drivability.
| 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) @ 3,500–4,000 rpm | |
Torque | 340 Nm @ 1,750–3,000 rpm | |
Fuel system | Bosch CRS 2-20 (up to 2,000 bar) | |
Emissions standard | Euro 6b | |
Compression ratio | 16.5:1 | |
Cooling system | Water-cooled | |
Turbocharger | Single variable-geometry turbo (Garrett GT1749V) | |
Timing system | Double-row roller chain (non-interference design) | |
Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
Dry weight | 169 kg |
The Audi CFSA was used across Audi's 8V/B9/FY platforms with transverse mounting in front-wheel-drive models and longitudinal in quattro variants. This engine received platform-specific adaptations-integrated start-generator (ISG) in mild-hybrid variants from 2018-and from 2015 all models adopted SCR/AdBlue systems, ensuring consistent Euro 6b compliance. All adaptations are documented in OEM technical bulletins.
The CFSA's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in vehicles with extended service intervals. Internal Audi field reports from 2018 indicated a significant number of pre-2017 units required HPFP replacement before 150,000 km, while UK DVSA MOT data shows DPF-related failures are common in short-trip diesel vehicles. Prolonged high-load operation and incorrect oil can accelerate pump wear, making correct lubricant selection and service adherence critical.
Analysis derived from Audi technical bulletins (2016-2019) and UK DVSA failure statistics (2017-2023). Repair procedures should follow manufacturer guidelines.
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The CFSA is generally robust, especially compared to earlier TDI engines. The main concern is HPFP wear in vehicles with extended oil intervals. When maintained with correct oil (VW 504 00/507 00) and regular service, the engine is reliable beyond 200,000 km. Timing chains are durable, but tensioners may wear beyond 200,000 km. Using correct oil and driving regularly on highways greatly enhances longevity.
Primary issues include high-pressure fuel pump wear, DPF saturation, and AdBlue system faults. Secondary concerns are timing chain tensioner rattle and occasional EGR valve sticking. These are documented in Audi service bulletins, particularly SIB 2016-02-01 for HPFP improvements and SIB 2015-03-01 for oil specification enforcement.
The CFSA 2.0 TDI 150 PS was used in the Audi A3 (8V, 2015–2020), A4 (B9, 2015–2020), Q5 (FY, 2017–2020), A5 (F5, 2017–2020), and Q3 (8U, 2018–2020). It was available in both front-wheel-drive and quattro configurations. All models feature SCR/AdBlue systems and meet Euro 6b emissions standards.
Yes, the CFSA responds well to ECU remapping. Stage 1 tunes typically achieve 180–195 PS safely, as the stock turbo and internals handle increased boost. Further gains require upgraded turbo, intercooler, and fueling. Tuning can increase DPF and EGR stress, so enhanced cooling and regular servicing are recommended to maintain reliability.
Excellent. In an A4 2.0 TDI (150 PS), combined consumption is ~4.1 L/100km (69 mpg UK). Highway runs can achieve ~3.7 L/100km (77 mpg UK), while city driving may reach ~5.0 L/100km (57 mpg UK). Real-world figures for mixed driving typically range from 50–65 mpg UK, depending on driving style and condition.
No. The CFSA uses a non-interference valvetrain design. If the timing chain fails, piston-to-valve contact is unlikely, reducing the risk of catastrophic engine damage. However, any timing issue still requires immediate repair to prevent valve or piston damage from secondary contact or loss of compression.
Audi specifies VW 504 00 / 507 00 (SAE 5W-30) synthetic oil. This low-ash formulation is essential for protecting the turbocharger, high-pressure fuel pump, and DPF. Change intervals are 15,000 km or annually under normal conditions, but shorten to 10,000 km for frequent short trips or towing.
Comprehensive technical documentation and regulatory references
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EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
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DVLA: Engine Changes & MoT
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Vehicle Certification Agency (VCA)
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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.
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