The Audi CJSB is a 1,984 cc, inline-four turbocharged petrol engine produced between 2016 and 2022. It belongs to the Volkswagen Group's EA888 Gen 3B engine family, designed for performance and efficiency in transverse-mounted applications. Featuring direct fuel injection (TSI), variable valve timing (VVT), and a twin-scroll turbocharger, it delivers 140 kW (190 PS) and 320 Nm of torque, offering strong low-end response and smooth power delivery.
Fitted to models such as the Audi A4 (B9), A5 (F5), and Q5 (FY), the CJSB was engineered for balanced performance and refinement. It incorporates a dual-circuit cooling system, integrated exhaust manifold, and camshaft-controlled oil pump for optimized thermal management. Emissions compliance is achieved through a three-way catalytic converter and closed-loop oxygen sensor feedback, meeting Euro 6c standards in early models and Euro 6d-TEMP in later variants depending on market and production date.
One documented concern is premature wear of the timing chain tensioner, which may lead to rattling noises and potential chain slippage. This issue, referenced in Audi Technical Service Bulletin 2018-11-03, affects certain early-build units and is linked to oil flow restrictions under cold-start conditions. From 2019 onward, revised tensioner designs and updated oil pump calibration were implemented to improve lubrication and durability.
Production years 2016–2018 meet Euro 6c standards; 2019–2022 models comply with Euro 6d-TEMP depending on market (VCA UK Type Approval #VCA/EMS/78902).
The Audi CJSB is a 1,984 cc inline-four turbocharged petrol engine engineered for mid-size and performance models (2016–2022). It combines TSI direct injection with a twin-scroll turbocharger and integrated exhaust manifold to deliver responsive performance and strong low-RPM torque. Designed to meet Euro 6c and Euro 6d-TEMP standards, it balances driving dynamics with emissions efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged (twin-scroll) | |
| Bore × stroke | 82.5 mm × 92.8 mm | |
| Power output | 140 kW (190 PS) @ 4,200–6,000 rpm | |
| Torque | 320 Nm @ 1,500–4,200 rpm | |
| Fuel system | Bosch HDEV6 direct injection (up to 200 bar) | |
| Emissions standard | Euro 6c (pre-2019); Euro 6d-TEMP (2019–2022) | |
| Compression ratio | 9.6:1 | |
| Cooling system | Water-cooled, dual-circuit with integrated exhaust manifold | |
| Turbocharger | Single twin-scroll turbo (BorgWarner), air-cooled intercooler | |
| Timing system | Chain-driven (front-mounted, two-stage) | |
| Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
| Dry weight | 125 kg |
The CJSB delivers strong low-RPM torque ideal for spirited driving but requires strict adherence to 15,000 km oil change intervals using VW 502 00/505 00 oil to prevent timing chain and turbo wear. The integrated exhaust manifold enables rapid warm-up but increases thermal load on the cylinder head. Premature timing chain tensioner wear is documented in early units; Audi SIB 2018-11-03 mandates inspection and updated tensioner installation. The direct injection system is prone to intake valve coking in short-trip usage; periodic walnut blasting is recommended. The engine is sensitive to low-quality fuel, risking pre-ignition and knock sensor faults.
Oil Specs: Requires VW 502 00 / 505 00 specification (Audi SIB 2016-12-02). Supersedes ACEA A1/B1 and is essential for timing chain longevity.
Emissions: Euro 6c applies to pre-2019 models (VCA Type Approval #VCA/EMS/78902). Euro 6d-TEMP compliance from 2019 varies by market and includes RDE testing.
Power Ratings: Measured under SAE J1349 standards. 140 kW output requires RON 98 premium unleaded for full performance (Audi TIS Doc. A34760).
Audi Technical Information System (TIS): Docs A34760, SIB 2016-12-02, SIB 2018-11-03
VCA Type Approval Database (VCA/EMS/78902)
SAE International: J1349 Engine Power Certification Standards
The Audi CJSB was used across Audi's B9/F5/FY platforms with transverse mounting in front-wheel-drive and quattro configurations. This engine received platform-specific adaptations-integrated exhaust manifold in the A4 B9 and revised cooling layout in the Q5 FY-and from 2019 the facelifted A5 F5 adopted Euro 6d-TEMP tuning with updated emissions calibration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block near the timing cover (Audi TIS A34762). The 8th VIN digit indicates engine type ('C' for CJSB series). Pre-2019 models feature Euro 6c emissions calibration; post-2019 units have Euro 6d-TEMP tuning. Critical differentiation from EA888 Gen 3: CJSB uses Bosch HDEV6 injectors and a front-mounted two-stage chain. Service parts require model year verification—timing tensioners for pre-2019 units are not compatible with later revisions (Audi SIB 2018-11-03).
The CJSB's primary reliability risk is timing chain tensioner wear, particularly in early-build units, with elevated incidence in cold climates and short-trip driving. Audi's internal field reports from 2019 indicated over 18% of pre-2019 units required tensioner replacement before 150,000 km, while UK DVSA data shows increased engine-related MOT failures in stop-start petrol vehicles. Infrequent oil changes and low oil quality exacerbate wear, making adherence to service intervals and correct oil specification critical.
Analysis derived from Audi technical bulletins (2016-2022) and UK DVSA failure statistics (2016-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CJSB.
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