The Audi CJTB is a 1,984 cc, inline-four turbocharged petrol engine produced between 2016 and 2021. It belongs to the Volkswagen Group's EA888 Gen 3B engine family, designed for improved thermal efficiency, reduced emissions, and enhanced performance over prior iterations. Featuring direct fuel injection (FSI), variable valve timing, and dual overhead camshafts (DOHC), it delivers 140 kW (190 PS) and 320 Nm of torque, with 48V mild-hybrid (MHEV) integration introduced from 2018 for enhanced start-stop and torque-fill functionality.
Fitted to models such as the Audi A4 (B9), A5 (F5), and Q5 (FY), including the 2.0 TFSI 190 PS variants, the CJTB was engineered for responsive performance, strong mid-range power delivery, and motorway refinement. Emissions compliance is achieved via a gasoline particulate filter (GPF), variable valve lift (VVL), and turbocharging, ensuring full Euro 6c and later Euro 6d-TEMP compliance across its production run.
One documented reliability concern is high-pressure fuel pump (HPFP) wear, particularly in vehicles with extended service intervals. This issue, referenced in Audi Technical Service Bulletin 2017-03-01, is attributed to inadequate lubrication under sustained high-load operation. From 2019, Audi introduced an updated HPFP calibration and revised oil monitoring logic to reduce premature wear incidence.
All production years (2016–2021) comply with Euro 6c/6d-TEMP standards (VCA UK Type Approval #VCA/EMS/8902).
The Audi CJTB is a 1,984 cc inline-four turbocharged petrol engine engineered for mid-size and compact SUV platforms (2016–2021). It combines direct fuel injection with a single turbocharger and 48V mild-hybrid integration from 2018 onward to deliver responsive mid-range performance and improved efficiency. Designed to meet Euro 6c and Euro 6d-TEMP standards, it balances real-world emissions compliance with driving dynamics.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Turbocharged | |
| 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 HDEV5 high-pressure direct injection (up to 200 bar) | |
| Emissions standard | Euro 6c (2016–2018); Euro 6d-TEMP (2018–2021) | |
| Compression ratio | 9.6:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Single turbo (IHI VF37 variable-vane) | |
| Timing system | Roller chain (non-interference design) | |
| Oil type | VW 502 00 / 505 00 (SAE 5W-30) | |
| Dry weight | 142 kg |
The CJTB delivers strong mid-range torque ideal for everyday driving but requires consistent use of VW 502 00/505 00 (5W-30) oil to protect the high-pressure fuel pump and turbocharger. Extended oil intervals increase the risk of HPFP wear, particularly under high-load conditions. GPF-equipped models require periodic regeneration and should avoid frequent short trips to prevent clogging. The roller chain timing system is robust and typically maintenance-free, though tensioner wear may occur beyond 200,000 km in poorly maintained units. Always use premium unleaded fuel (RON 95 or higher) to maintain performance and prevent knock.
Oil Specs: Requires VW 502 00 / 505 00 specification (Audi SIB 2016-03-01). Compatible with ACEA A1/B1 standards.
Emissions: Euro 6c applies to 2016–2018 models; Euro 6d-TEMP from 2018 onward (VCA Type Approval #VCA/EMS/8902).
Power Ratings: Measured under SAE J1349 standards. Output consistent across EU markets with EN 228 fuel (Audi TIS Doc. A35202).
Audi Technical Information System (TIS): Docs A35200, A35201, A35202, SIB 2017-03-01
VCA Type Approval Database (VCA/EMS/8902)
SAE International: J1349 Engine Power Certification Standards
Volkswagen Group Product Bulletin PT-Petrol2016
The Audi CJTB was used across Audi's B9/F5/FY platforms with longitudinal mounting in quattro variants and transverse in front-wheel-drive models. This engine features 48V mild-hybrid integration from 2018 onward and GPF systems standard on all units, ensuring Euro 6c and later Euro 6d-TEMP compliance. Platform-specific calibrations and hybrid integration create 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 A35205). The 8th VIN digit indicates engine type ('H' for CJTB series). All CJTB engines feature a gasoline particulate filter (GPF) integrated into the exhaust manifold and a 48V belt alternator starter (BAS) unit visible at the front of the engine bay from 2018 onward. Critical differentiation: CJTB has a Bosch HDEV5 direct injection system and IHI VF37 turbo; earlier CAEB engines lack MHEV components. Service parts require model-year verification—GPFs, fuel pumps, and turbochargers are not interchangeable between non-MHEV and MHEV variants (Audi SIB 2017-03-01).
The CJTB's primary reliability risk is high-pressure fuel pump wear, with elevated incidence in vehicles with extended service intervals. Internal Audi field reports from 2020 indicated a significant number of pre-2019 units required HPFP replacement before 160,000 km, while UK DVSA MOT data shows GPF-related failures are common in short-trip petrol 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 (2017-2021) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CJTB.
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