The Audi CYRB is a 1,968 cc, inline-four turbo-diesel engine produced between 2015 and 2023. It belongs to the Volkswagen Group's EA288 evo engine family, engineered for enhanced efficiency, reduced emissions, and improved refinement. Featuring common rail direct injection, variable geometry turbocharging (VGT), and DOHC valvetrain, it delivers 110 kW (150 PS) and 340 Nm of torque, with optimized low-end responsiveness and thermal efficiency.
Fitted to models including the A3 (8V), A4 (B9), A6 (C8), and Q5 (FY), the CYRB was designed for balanced performance and real-world fuel economy across Audi’s mid-size lineup. Emissions compliance is achieved via exhaust gas recirculation (EGR), diesel particulate filter (DPF), and selective catalytic reduction (SCR) with AdBlue injection, meeting Euro 6c and later Euro 6d emissions standards.
One documented reliability concern is high-pressure fuel injector degradation, particularly in vehicles subjected to frequent short trips or marginal fuel quality. This issue, referenced in Audi Technical Service Bulletin 2018-37, is linked to coking of injector nozzles due to incomplete combustion under low-temperature operation. Later production revisions incorporated updated injector calibration and enhanced fuel filtration to improve long-term durability.
Production years 2015–2020 meet Euro 6c standards; 2020–2023 models comply with Euro 6d (VCA UK Type Approval #VCA/EMS/9012).
The Audi CYRB is a 1,968 cc inline-four turbo-diesel engineered for mid-size platforms (2015–2023). It combines common-rail direct injection with a variable geometry turbocharger to deliver responsive low-RPM torque and smooth highway cruising. Designed to meet evolving Euro 6 emissions standards, it balances real-world 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) @ 3,500–4,000 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 (pre-2020), Euro 6d (2020–2023) | |
| Compression ratio | 16.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Variable geometry turbo (Garrett GT1749V) | |
| Timing system | Timing belt (interval: 150,000 km or 5 years) | |
| Oil type | VW 504 00 / 507 00 (SAE 5W-30) | |
| Dry weight | 148 kg |
The CYRB provides strong low-end torque ideal for mixed driving but requires strict adherence to 15,000 km oil change intervals and high-quality 5W-30 oil meeting VW 504 00/507 00 standards to protect the turbo and fuel system. The timing belt must be replaced every 150,000 km or 5 years—failure risks severe engine damage due to interference design. The Bosch CRS 2-20 fuel system is sensitive to water and contaminants, requiring regular use of ultra-low-sulfur diesel (EN 590). EGR and DPF systems need periodic regeneration; prolonged short trips may lead to clogging and limp mode. Pre-2020 models benefit from updated injector calibration per Audi TSB 2018-37 to reduce coking under low-temperature operation.
Oil Specs: Requires VW 504 00 / 507 00 specification (Audi SIB 23 10 12). Compatible with ACEA C3.
Emissions: Euro 6c applies to 2015–2020 models; Euro 6d certification applies to 2020–2023 (VCA Type Approval #VCA/EMS/9012).
Power Ratings: Measured under SAE J1349. Output consistent across markets with EU diesel (Audi TIS Doc. A32010).
Audi Technical Information System (TIS): Docs A32010, A32105, SIB 23 10 12
VCA Type Approval Database (VCA/EMS/9012)
SAE International: J1349 Engine Power Certification Standards
The Audi CYRB was used across Audi's 8V/B9/C8 platforms with longitudinal mounting and shared within the Volkswagen Group for transverse applications. This engine received platform-specific calibrations-fuel mapping in the A3 and enhanced cooling in the Q5-and from 2020, certain A4 B9 facelift models adopted revised EGR routing, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block, just below the exhaust manifold (Audi TIS A32010). The 8th VIN digit identifies the engine type ('B' for CYRB in Audi models). Pre-2020 units have a black plastic intake manifold; post-2020 variants may feature revised EGR routing with integrated cooler. Critical differentiation from other EA288 evo engines: CYRB uses a Garrett VGT turbo with a vacuum-actuated wastegate, whereas non-VGT variants use a fixed geometry turbo. Service parts require production date verification—timing belts for pre-2020 models are not interchangeable with later revisions due to tensioner design changes (Audi SIB 23 10 12).
The CYRB's primary reliability risk is fuel injector coking, with elevated incidence in mixed urban/short-trip use. Internal Audi quality reports from 2019 indicated a measurable share of pre-2020 units requiring injector cleaning before 140,000 km, while UK DVSA records show EGR-related faults contributing to emissions test failures in stop-start traffic. Extended oil intervals and low-quality diesel increase injector and EGR stress, making fuel quality and maintenance adherence critical.
Analysis derived from Audi technical bulletins (2015–2023) and UK DVSA failure statistics (2018–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CYRB.
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Regulation (EC) No 715/2007
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