The Volkswagen CYKB is a 1,395 cc, inline‑four turbocharged petrol engine produced between 2012 and 2020. It features an aluminium block and head, DOHC 16‑valve architecture, and direct fuel injection, paired with a small twin‑scroll turbocharger and integrated exhaust manifold. In standard form it delivers 92 kW (125 PS) and 200 Nm of torque, with responsive low‑end thrust ideal for compact urban mobility.
Fitted to models including the Polo Mk5, Fabia III, and Ibiza 6…
Production years 2012–2020 meet Euro 6b emissions standards (VCA UK Type Approval #VCA/EMS/8765).
The Volkswagen CYKB is a 1,395 cc inline‑four turbocharged petrol engine engineered for supermini and compact models (2012–2020). It combines direct injection with a twin-scroll turbocharger and integrated exhaust manifold to deliver brisk low-RPM response and urban efficiency. Designed to meet Euro 6b standards, it balances performance with stringent emissions control.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,395 cc | |
Fuel type | Petrol (95 RON minimum) | |
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 @ 1,400–3,500 rpm | |
Fuel system | Bosch HDP5 high-pressure direct injection (up to 200 bar) | |
Emissions standard | Euro 6b | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled with electric auxiliary pump | |
Turbocharger | Twin‑scroll turbo (Honeywell TD025) | |
Timing system | Chain (front‑mounted; 240,000 km design life) | |
Oil type | VW 502 00 / 504 00 (SAE 5W‑30 or 5W‑40) | |
Dry weight | 112 kg |
The Volkswagen CYKB was used across Volkswagen's PQ25 and MQB A0 platforms with transverse mounting and licensed to Škoda and SEAT. This engine received a critical camshaft revision in mid‑2016, creating parts interchange limits between early and late production. Cross-brand usage includes Škoda Fabia III and SEAT Ibiza 6J. All adaptations are documented in OEM technical bulletins.
The CYKB's primary reliability risk is high-pressure fuel pump cam lobe wear on early production engines, with elevated incidence in high-mileage or hot-climate use. Volkswagen internal quality data from 2016 noted a significant share of pre‑mid‑2016 units requiring camshaft replacement before 100,000 km, while UK DVSA records show frequent MOT advisories for misfires linked to carbon-fouled intake valves in urban-driven examples. Extended short-trip cycles and poor oil quality accelerate cam and chain degradation, making oil discipline and fuel system maintenance critical.
Analysis derived from Volkswagen technical bulletins (2012–2020) and UK DVSA petrol engine reliability reports (2015–2023). Repair procedures should follow manufacturer guidelines.
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The CYKB is generally robust when maintained properly. Early engines (pre-mid-2016) have known cam lobe wear issues, resolved in later production. The timing chain is durable if oil changes are adhered to. With correct oil, fuel, and occasional highway use to mitigate carbon buildup, it can deliver long service life, especially in mixed driving conditions.
Top issues include HPFP cam lobe wear (early engines), intake valve carbon buildup due to direct injection, timing chain tensioner rattle, and turbo wastegate sticking. These are documented in Volkswagen TSB 2015‑12 and ETKA service procedures. Regular oil changes and intake cleaning are essential.
The CYKB was used in the Polo Mk5 (2012–2017), Polo Mk6 (2017–2020), Škoda Fabia III (2015–2020), and SEAT Ibiza 6J (2017–2020), all with 125 PS output. It was shared across the VW Group under the MQB/PQ25 platform strategy for compact models.
Yes. ECU remaps typically yield 150–160 PS safely, as the internals handle increased torque. However, the HPFP and cam lobe integrity must be verified before tuning—especially on pre-2016 engines. Supporting upgrades (intercooler, exhaust) improve reliability. Over-tuning without cam inspection risks catastrophic fuel system failure.
Real-world consumption is 5.5–6.5 L/100km (43–51 mpg UK) in mixed driving. Highway cruising can achieve 5.0 L/100km, while city use may exceed 7.5 L/100km. The engine’s torque allows relaxed gear use, contributing to efficiency. Carbon buildup over time may reduce economy if not addressed.
Yes. The CYKB is an interference design. If the timing chain fails or skips, pistons will contact open valves, causing severe internal damage. However, the front-mounted chain is robust when maintained with correct oil and intervals.
Volkswagen specifies 5W‑30 or 5W‑40 synthetic oil meeting VW 502 00 or 504 00 standard (Volkswagen Lubricants Spec VLS‑502‑00). This ensures proper chain and turbo lubrication. Oil must be changed every 15,000 km or 12 months.
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