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 responsive low‑end torque. Emissions compliance was achieved through a three‑way catalytic converter, secondary air injection, and precise lambda control, meeting Euro 5 standards at launch and Euro 6 from 2015 onward.
One documented concern is premature wear of the timing chain tensioner, potentially causing chain rattle or misalignment. This issue, highlighted in Volkswagen Service Technical Bulletin 2015‑06‑02, is linked to marginal oil flow during cold starts in early production units. From mid‑2016, revised tensioner components were introduced to improve durability.
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 CJSC delivers brisk low-end response ideal for city driving but requires strict adherence to 15,000 km or 12-month oil change intervals using VW 502 00/504 00 oil to protect the turbo and timing system. The Bosch HDP4 high-pressure fuel pump is sensitive to low-quality fuel; only EN 228-compliant RON 95+ petrol should be used. Early units (pre-06/2016) are susceptible to timing chain tensioner wear—addressed by updated parts per VW SIB 2015‑06‑02. Carbon buildup on intake valves is minimal due to direct injection, though occasional decarbonisation may be beneficial after 100,000 km.
Oil Specs: Requires VW 502 00 / 504 00 (5W‑40) specification (Volkswagen Owner’s Manual 2013).
Emissions: Euro 5 applies to 2012–2014 builds; Euro 6 certification for 2015–2019 models (VCA Type Approval #VCA/EMS/7891).
Power Ratings: Measured under ISO 1585 standards. Peak output assumes RON 95 fuel; RON 98 improves knock margin (VW TIS Doc. 01‑2012‑CJSC).
Volkswagen Technical Information System (TIS): Docs 01‑2012‑CJSC, SIB 2015‑06‑02
VCA Type Approval Database (VCA/EMS/7891)
ISO 1585: Road vehicles — Engine test code
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.
Locate the engine code stamped on the front timing cover near the oil filter housing (VW TIS 01‑2012‑CJSC). The 7th VIN digit is 'C' for CJSC-equipped vehicles. Visual identification: black plastic cam cover with 'TSI 125' badge. Critical differentiation from CAXA/CBTA: CJSC uses Honeywell TD025 turbo with integrated exhaust manifold and Bosch HDP4 fuel pump. Timing tensioner part number 03C 109 271 A (pre‑06/2016) vs. 03C 109 271 D (post‑update) per VW SIB 2015‑06‑02.
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.
Find answers to most commonly asked questions about VOLKSWAGEN CJSC.
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