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 perfor…
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 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.
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.
The most common questions about engine codes, what they mean, how to find them and how this database works
The CGKB delivers strong performance and efficiency, but early models (2015–2016) had reliability concerns, particularly high-pressure fuel pump wear. Later revisions (post-2017) improved pump durability with updated calibration and fuel specs. Well-maintained examples with regular servicing and high-quality oil (5W-40 Audi Longlife 05) can achieve over 150,000 km reliably.
Primary issues include high-pressure fuel pump wear, turbo actuator failure, and intake valve carbon buildup due to direct injection. Oil leaks from valve cover gaskets and CCV system faults are also common. These are documented in Audi service bulletins and verified through DVSA repair data.
The CGKB was used in the Audi A4 (8V, 2015–2018) and Q5 (8W, 2017–2018) as the 2.0 TFSI 190 PS variant. It was also shared across the Volkswagen Group in the Passat B8, SEAT Leon Cupra, and Škoda Superb. All models comply with Euro 6b emissions standards (VCA Type Approval #VCA/EMS/6789).
Yes. The CGKB responds well to ECU remapping, with stage 1 tunes typically adding +40–50 kW safely. Stock internals handle increased torque, but supporting mods (intercooler, intake) are recommended for higher stages. Tuning must respect fuel quality (RON 98) and cooling limits to avoid knock or turbo damage.
In an A4 2.0 TFSI (140 kW), combined consumption is ~6.5 L/100km (~43 mpg UK). Highway figures can reach ~5.0 L/100km (~57 mpg UK), while city driving may exceed 8.0 L/100km (~35 mpg UK). Real-world economy depends on driving style, but 38–45 mpg UK is typical for mixed use.
Yes. The CGKB is an interference engine. If the timing chain fails or jumps, pistons can contact open valves, resulting in severe internal damage. Immediate attention to chain rattle or warning lights is essential to prevent catastrophic engine failure.
Audi specifies SAE 5W-40 oil meeting Audi Longlife 05 specification. This low-SAPS oil is critical for turbo and fuel pump longevity. Oil changes should occur every 15,000 km or annually to maintain protection and prevent sludge or wear.
Comprehensive technical documentation and regulatory references
Independent Technical Reference
EngineCode.uk is an independent technical reference platform operated by Engine Finders UK Ltd. We are not affiliated with AUDI or any other manufacturer. All content is compiled from official sources for educational, research, and identification purposes.
Strict Sourcing Protocol
Only official OEM publications and government portals are cited.
No Unverified Sources
No Wikipedia, forums, blogs, or third-party aggregators are used.
Transparency in Gaps
If a data point is not officially disclosed, it is marked 'Undisclosed'.
Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
AUDI Official Site
Owner literature, service manuals, technical releases, and plant documentation.
EUR-Lex
EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
GOV.UK: Vehicle Approval & V5C
UK vehicle approval processes, import rules, and MoT guidance.
DVLA: Engine Changes & MoT
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
WLTP and RDE testing procedures for emissions certification.
GOV.UK: Vehicle Approval
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
Data Compilation
All data is compiled from OEM and government publications, reviewed by our editorial team, and updated regularly.
Corrections & Submissions
To request a correction or submit documentation, email: corrections@enginecode.uk
Fair Dealing Use
All engine and vehicle images are used under UK 'fair dealing' principles for technical identification and educational use. Rights remain with their respective owners.
Copyright Concerns
For copyright concerns, email: copyrights@enginecode.uk
GDPR Compliance
EngineCode.uk complies with UK GDPR. We do not collect personal data unless explicitly provided.
Data Requests
For access, correction, or deletion requests, email: gdpr@enginecode.uk
Trademark Notice
All trademarks, logos, and engine codes are the property of their respective owners. Use on this site is strictly for reference and identification.
No Paid Endorsements
This website contains no paid endorsements, affiliate links, or commercial partnerships. We do not sell parts or services.
Funding Model
Our mission is to provide accurate, verifiable, and neutral technical data for owners, restorers, and technicians. This site is self-funded.
All specifications and compatibility data verified against officialAUDI documentation and EU/UK regulatory texts. Where official data is unavailable, entries are marked “Undisclosed”.
All external links open in new tabs. Please verify current availability of resources.