The Audi CYVB is a 1,968 cc, inline-four turbo-diesel engine produced between 2018 and 2023. Part of the Volkswagen Group's EA288 evo engine family, it was engineered for enhanced efficiency, reduced emissions, and improved durability. Featuring common rail direct injection, variable geometry turbocharging (VGT), and dual overhead camshafts (DOHC), it delivers 110 kW (150 PS) and 360 Nm of torque, meeting strict Euro 6d emissions standards through integrated SCR, AdBlue dosing, and advanced NOx trapping technology.
Fitted to models such as the A4 (B9), A5 (F5), and Q5 (FY), the CYVB was designed for refined performance and real-world emissions compliance. Emissions control is achieved via high-pressure EGR, diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, enabling full Euro 6d-TEMP certification across all markets from launch. The engine features revised piston ring design and dual-loop EGR system to reduce oil dilution and improve combustion stability under real driving conditions.
One documented concern is NOx sensor drift in early production units, identified in Audi Technical Service Bulletin 2019-07-03. This issue arises from thermal stress on the upstream NOx sensor, leading to inaccurate readings and potential DPF regeneration faults. From 2020, Audi introduced an updated sensor housing with improved thermal shielding and revised calibration logic to reduce fault incidence.
All production years (2018–2023) meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/5682).
The Audi CYVB is a 1,968 cc inline-four turbo-diesel engineered for mid-size and premium models (2018–2023). It combines common-rail direct injection with a variable-geometry turbocharger and full SCR-based aftertreatment to deliver responsive torque and regulated emissions performance. Designed exclusively for Euro 6d compliance, it balances strong low-end pull with strict environmental requirements.
| 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 | 360 Nm @ 1,750–3,000 rpm | |
| Fuel system | Bosch CRS 2-20 (up to 2,000 bar) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 16.5:1 | |
| Cooling system | Water-cooled with dual-circuit thermostat | |
| Turbocharger | Single variable-geometry turbo (Honeywell) | |
| Timing system | Chain-driven (integrated in rear cover) | |
| Oil type | VW 504 00 / 507 00 (5W-30) | |
| Dry weight | 159 kg |
The CYVB provides strong low-RPM torque ideal for highway and urban driving but requires strict adherence to 15,000 km oil service intervals using VW 504 00/507 00 specification oil to maintain turbo and SCR system longevity. The AdBlue-based emissions system demands regular refills and active regeneration cycles; neglect can trigger limp mode. EGR and intake carbon buildup is common in short-trip driving, requiring periodic cleaning per Audi TIS A41278. Post-2020 models feature revised NOx sensors; pre-2020 units should be inspected for sensor drift. Use of ultra-low-sulfur diesel (EN 590) is mandatory to prevent injector coking and fuel pump wear. Real Driving Emissions (RDE) compliance requires consistent long-distance driving to maintain system calibration.
Oil Specs: Requires VW 504 00 / 507 00 (5W-30) specification (Audi SIB 2018-09-01). Not compatible with ACEA A/B standards.
Emissions: Full Euro 6d-TEMP compliance across all production years (2018–2023) per VCA UK Type Approval #VCA/EMS/5682.
Power Ratings: Measured under SAE J1349. Output consistent across markets; SCR-equipped models maintain torque in high-altitude conditions (Audi TIS A41278).
Audi Technical Information System (TIS): Docs A41278, SIB 2019-07-03
VCA Type Approval Database (VCA/EMS/5682)
SAE International: J1349 Engine Power Certification Standards
Volkswagen Group Product Technical Dossier PT-Diesel2018
The Audi CYVB was used across Audi's B9/F5/FY platforms with longitudinal mounting and shared within the Volkswagen Group for premium applications. This engine received platform-specific adaptations-revised cooling layouts in the Q5 and enhanced NVH tuning in the A5-and from 2020 the facelifted A4 B9.5 adopted updated NOx sensor calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front-facing side of the cylinder block, near the timing cover (Audi TIS A41278). The 8th VIN digit indicates engine type ('C' for CYVB series). All CYVB engines feature an AdBlue tank and SCR dosing module on the exhaust. Critical differentiation from CUVB: CYVB has revised NOx sensor calibration, dual-loop EGR, and updated ECU mapping. Service parts require production date verification—NOx sensors for pre-2020 models are not compatible with post-revision units due to internal redesign (Audi SIB 2019-07-03).
The CYVB's primary reliability risk is NOx sensor drift on pre-2020 units, with elevated incidence in mixed urban/highway driving. Audi internal quality reports from 2021 noted increased SCR-related fault codes in vehicles with frequent short trips, while UK DVSA data links NOx system faults to over 20% of diesel-related MOT advisories. Thermal cycling and poor regeneration cycles amplify sensor degradation, making regular inspection and proper fluid use critical.
Analysis derived from Audi technical bulletins (2018-2023) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CYVB.
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