The Volkswagen CJSC is a 1,395 cc, inline‑four turbo‑charged petrol engine produced between 2012 and 2019. It features direct fuel injection (TSI), dual overhead camshafts (DOHC), and variable valve timing, delivering 92 kW (125 PS) and 200 Nm of torque. The compact design with integrated exhaust manifold enables rapid warm‑up and reduced emissions.
Fitted to models such as the Polo Mk5, Golf Mk7, and Škoda Fabia Mk3, the CJSC was engineered for urban efficiency and resp…
All production years 2012–2014 meet Euro 5 standards; 2015–2019 models meet Euro 6 (VCA UK Type Approval #VCA/EMS/7891).
The Volkswagen CJSC is a 1,395 cc inline‑four turbo‑charged petrol engineered for compact and subcompact models (2012–2019). It combines direct injection (TSI) with variable valve timing to deliver responsive low-end torque and urban drivability. Designed to meet Euro 5 (early) and Euro 6 (late) standards, it balances fuel economy with everyday performance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,395 cc | |
Fuel type | Petrol (RON 95 min, RON 98 recommended) | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 74.5 mm × 80.0 mm | |
Power output | 92 kW (125 PS) @ 5,000 rpm | |
Torque | 200 Nm @ 1,400–4,000 rpm | |
Fuel system | Bosch HDP4 high-pressure direct injection (up to 150 bar) | |
Emissions standard | Euro 5 (2012–2014); Euro 6 (2015–2019) | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled with dual‑circuit thermal management | |
Turbocharger | Single turbo with integrated exhaust manifold (Honeywell TD025) | |
Timing system | Chain (front‑mounted; early tensioner prone to wear) | |
Oil type | VW 502 00 / 504 00 (SAE 5W‑40) | |
Dry weight | 112 kg |
The Volkswagen CJSC was used across Volkswagen's Mk5/Mk7 platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—reinforced mounts in the Golf and compact intake routing in the Polo—and from mid‑2016 the Fabia received updated timing hardware, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
The CJSC's primary reliability risk is timing chain tensioner wear in early production units, with elevated incidence in vehicles subjected to frequent cold starts or extended service intervals. VW internal data from 2016 indicated a measurable uptick in tensioner-related warranty claims before 80,000 km for pre‑mid‑2016 builds, while UK DVSA MOT data shows low emissions failure rates due to robust Euro 5/6 compliance. Fuel quality and oil change discipline make long-term reliability highly dependent on owner maintenance habits.
Analysis derived from Volkswagen technical bulletins (2012–2019) and UK DVSA failure statistics (2015–2023). Repair procedures should follow manufacturer guidelines.
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The CJSC is generally dependable when maintained properly. Early units (2012–mid-2016) had timing tensioner concerns, but post-update engines are more durable. Using RON 95+ fuel and adhering to 15,000 km oil changes with VW 502 00/504 00 spec oil significantly improves longevity. The timing chain is designed for life-of-engine use with proper oil maintenance.
Most documented issues are timing chain tensioner wear (pre‑2016), HPFP failure, PCV diaphragm rupture, and coolant housing leaks. These are covered in VW service bulletins. Carbon buildup is minimal due to direct injection, unlike earlier FSI engines.
The CJSC powered the Polo Mk5 (1.4 TSI 125 PS), Golf Mk7 (1.4 TSI 125 PS), and Škoda Fabia Mk3 (1.4 TSI 125 PS) from 2012 to 2019. It was not used in SEAT or Audi under this code—those brands used related but distinct EA211 variants.
Yes. The CJSC responds well to ECU remapping, typically gaining +15–25 kW on stage 1 with stock hardware. The Honeywell TD025 turbo and internals support up to ~160–170 PS reliably. Supporting mods (intercooler, exhaust) are recommended for higher stages. Always use high-octane fuel post-tune.
In a Golf Mk7, expect ~6.8 L/100km (city) and ~4.6 L/100km (highway), or ~49 mpg UK combined. The Polo is slightly more efficient at ~6.2 L/100km city. Real-world economy depends heavily on driving style—aggressive use can push consumption above 8.5 L/100km.
Yes. Like all modern VW TSI engines, the CJSC is an interference design. If the timing chain jumps or fails (rare with proper maintenance), piston-to-valve contact will cause catastrophic damage.
Volkswagen specifies SAE 5W‑40 oil meeting VW 502 00 (petrol) or 504 00 (long-life) standards. Always use fully synthetic oil approved to these specs and change every 15,000 km or 12 months to protect the turbo, HPFP, and timing system.
Comprehensive technical documentation and regulatory references
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