The Audi CGKB is a 1,984 cc, inline-four turbocharged petrol engine produced between 2015 and 2018. It belongs to the Volkswagen Group’s EA888 Gen 3 engine family, featuring aluminium construction, direct fuel injection (TSI), and dual overhead camshafts (DOHC). In standard tune it delivered 140 kW (190 PS), with peak torque of 320 Nm available from 1,500 rpm.
Fitted to models including the 8V A4, 8W Q5, and Volkswagen Passat B8, the CGKB was engineered for balanced performance and efficiency across mid-size platforms. It met Euro 6 emissions standards through a combination of direct injection, variable valve timing, and an integrated exhaust manifold, with thermal management controlled via an electro-mechanical coolant pump to accelerate warm-up and reduce urban emissions.
One documented concern is high-pressure fuel pump (HPFP) wear under aggressive driving conditions, highlighted in Audi Service Information Bulletin 2016-11. The issue stems from insufficient lubrication of the plunger assembly when low-octane fuel is used. From 2017, revised fuel pump calibration and updated oil specifications were implemented to improve durability across the EA888 range.
All production years (2015–2018) comply with Euro 6b standards (VCA UK Type Approval #VCA/EMS/6789).
The Audi CGKB is a 1,984 cc inline-four turbocharged petrol engine engineered for mid-size platforms (2015–2018). It combines TSI direct injection with a twin-scroll turbocharger and an integrated exhaust manifold to deliver strong low-end torque and responsive acceleration. Designed to meet Euro 6b standards, it balances performance with urban fuel economy and emissions compliance.
| 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 @ 1,500–4,000 rpm | |
| Fuel system | Bosch HDEV6 direct injection (up to 200 bar) | |
| Emissions standard | Euro 6b | |
| Compression ratio | 9.6:1 | |
| Cooling system | Water-cooled with electro-mechanical coolant pump | |
| Turbocharger | IHI IS38 twin-scroll turbocharger with electronic wastegate | |
| Timing system | Roller chain (front-mounted; revised tensioner post-2016) | |
| Oil type | Audi Longlife 05 (SAE 5W-40) | |
| Dry weight | 135 kg |
The integrated exhaust manifold and twin-scroll turbo provide strong low-RPM response ideal for daily driving but demand adherence to 15,000 km oil service intervals to prevent HPFP and turbo bearing degradation. Audi Longlife 05 (5W-40) oil is essential due to its high-temperature stability and protection of the fuel pump plunger system. Extended idling and short trips increase carbon buildup on intake valves. The HDEV6 fuel pump requires premium unleaded (RON 98) to maintain injector efficiency and prevent pre-ignition. Post-2017 models feature revised HPFP calibration; pre-2017 units should be monitored per Audi SIB 16 11 05. GPF-equipped variants require periodic regeneration to avoid clogging.
Oil Specs: Requires Audi Longlife 05 (5W-40) specification (Audi SIB 16 11 05). Supersedes ACEA A3/B4 standards.
Emissions: All models (2015–2018) comply with Euro 6b standards (VCA Type Approval #VCA/EMS/6789).
Power Ratings: Measured under SAE J1349 standards. Full 140 kW output requires RON 98 fuel (Audi TIS Doc. A38201).
Audi Technical Information System (TIS): Docs A38050, A38102, SIB 16 11 05
VCA Type Approval Database (VCA/EMS/6789)
SAE International: J1349 Engine Power Certification Standards
The Audi CGKB was used across Audi's 8V/8W platforms with longitudinal mounting and shared within the Volkswagen Group for transverse and longitudinal applications. This engine received platform-specific adaptations-revised cooling routing in the Q5 and transmission-specific torque calibration in the A4-and from 2017 the facelifted A4 Avant adopted the CGKB with GPF integration, creating interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped vertically on the right-side cylinder block near the exhaust manifold (Audi TIS A38080). The 7th VIN digit indicates engine family ('C' for EA888 TSI). Pre-2017 models have silver valve covers with black plastic timing covers; post-2017 units use black valve covers with GPF routing. Critical differentiation from CAHA: CGKB features IHI IS38 twin-scroll turbo with electronic actuator; CAHA uses KP39 with vacuum diaphragm. Service parts require production date verification - fuel pumps for engines before 06/2017 are incompatible with later units due to calibration changes (Audi SIB 16 11 05).
The CGKB's primary reliability risk is high-pressure fuel pump wear on pre-2017 builds, with elevated incidence in high-load driving. Internal Audi quality reports from 2016 noted a significant share of early engines requiring HPFP replacement before 80,000 km, while UK DVSA records associate a notable portion of misfire-related MOT failures with fuel system faults in stop-start traffic. Aggressive throttle use and low-octane fuel increase pump stress, making fuel quality and interval adherence critical.
Analysis derived from Audi technical bulletins (2015-2018) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about AUDI CGKB.
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