The Volkswagen CNWA is a 1,984 cc, inline‑four turbocharged petrol engine produced between 2008 and 2015. It features direct fuel injection (TSI), dual overhead camshafts (DOHC), and variable valve timing, delivering 155 kW (211 PS) and 280 Nm of torque. The integrated exhaust manifold enables rapid warm‑up and improved emissions control.
Fitted to models such as the Golf Mk6 R, Scirocco R, and Audi S3 (8P), the CNWA was engineered for high‑performance driving with ever…
All production years 2008–2015 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Volkswagen CNWA is a 1,984 cc inline‑four turbocharged petrol engine engineered for high‑performance hatchbacks and coupés (2008–2015). It combines direct fuel injection (TSI) with a single turbocharger and integrated exhaust manifold to deliver responsive power and strong mid‑range torque. Designed to meet Euro 5 emissions standards, it balances track capability with daily drivability.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,984 cc | |
Fuel type | Petrol (RON 95 min, RON 98 recommended) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 82.5 mm × 92.8 mm | |
Power output | 155 kW (211 PS) @ 6,000 rpm | |
Torque | 280 Nm @ 1,800–5,500 rpm | |
Fuel system | Bosch HDP5 high‑pressure direct injection (up to 150 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 9.8:1 | |
Cooling system | Water‑cooled with dual‑circuit layout | |
Turbocharger | Single K04 turbo (Garrett) | |
Timing system | Chain‑driven (front‑mounted) | |
Oil type | VW 502 00 / 505 00 (SAE 5W‑40) | |
Dry weight | 149 kg |
The Volkswagen CNWA was used across Volkswagen's Mk6 and Scirocco platforms with transverse mounting and shared with Audi for longitudinal applications. This engine received platform-specific adaptations—reinforced mounts in the Golf R and revised cooling in the Scirocco R—and from mid-2012 the HPFP cam follower was updated, creating service part distinctions. Partnerships allowed Audi's S3 (8P) to use the same engine block with minor ECU and exhaust tuning. All adaptations are documented in OEM technical bulletins.
The CNWA's primary reliability risk is high-pressure fuel pump (HPFP) failure, with elevated incidence in high-mileage or low-fuel-quality usage. Volkswagen internal data from 2012 indicated a notable share of pre-2012 engines requiring HPFP replacement before 100,000 km, while UK DVSA MOT records show increased misfire-related failures in modified or poorly maintained examples. Extended oil intervals and RON 95 fuel use increase cam follower wear, making oil quality and fuel grade critical.
Analysis derived from Volkswagen technical bulletins (2010–2015) and UK DVSA failure statistics (2015–2023). 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 CNWA offers strong performance but requires disciplined maintenance. Early units (pre-2012) are prone to HPFP issues, mitigated by updated parts. With correct oil (5W‑40 VW 502 00), RON 98 fuel, and timely service, it can exceed 200,000 km reliably.
Top issues include HPFP/cam follower wear, intake carbon buildup (no port injection), turbo oil coking, and PCV valve failure in the valve cover. These are documented in Volkswagen SIB 2011‑07‑03 and TIS repair procedures.
Primarily the Golf R Mk6 (2009–2013) and Scirocco R (2009–2015). It was also used in the Audi S3 (8P, 2008–2012) with identical internals but different ECU tuning and exhaust calibration.
Yes. Stage 1 ECU remaps safely yield 240–260 PS. Stage 2 (with upgraded intercooler, exhaust, and HPFP) can reach 300+ PS. However, aggressive tuning accelerates HPFP and turbo wear—supporting mods and fuel quality (RON 98+) are essential.
Real-world figures average 9.5 L/100km (city) and 6.8 L/100km (highway), or ~33 mpg UK combined. Aggressive driving or tuning can push consumption above 11 L/100km. Economy improves with gentle throttle use and highway cruising.
Yes. The CNWA is an interference design. Timing chain failure (rare but possible) can cause piston-to-valve contact and catastrophic damage. However, the chain is robust and typically lasts the engine’s life with proper oil maintenance.
Volkswagen specifies 5W‑40 synthetic oil meeting VW 502 00 (petrol) or 505 00 (diesel-compatible). Always use OEM-approved oil and change every 15,000 km or 12 months to protect the turbo, HPFP, and timing components.
Comprehensive technical documentation and regulatory references
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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
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GOV.UK: Vehicle Approval
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