The Volkswagen YN is a 1,395 cc, inline‑four turbocharged petrol engine produced between 2012 and 2019. It features direct fuel injection (TSI), dual overhead camshafts (DOHC), and a single twin‑scroll turbocharger, delivering 92 kW (125 PS) and 200 Nm of torque. The compact design and low‑inertia turbo enable responsive low‑rpm performance suitable for urban and mixed driving conditions.
Fitted to models including the Mk7 Golf, Polo, and SEAT Ibiza, the YN was engine…
Volkswagen
All production years (2012–2019) meet Euro 5 standards . No Euro 6 variants were produced.
The Volkswagen YN is a 1,395 cc inline‑four turbocharged petrol engine engineered for compact hatchbacks and sedans (2012–2019). It combines direct injection with a twin‑scroll turbocharger to deliver responsive low‑end torque and efficient urban driving. Designed to meet Euro 5 emissions standards, it balances performance with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,395 cc | |
Fuel type | Petrol (Unleaded) | |
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 | Direct injection (Bosch HDEV5, up to 200 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single twin‑scroll (Honeywell GT1241V) | |
Timing system | Chain‑driven DOHC | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 112 kg |
The Volkswagen YN was used across Volkswagen's Mk7 Golf and Polo platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Golf and unique exhaust manifolds in the Polo—and from 2015 the facelifted Polo adopted updated PCV hoses and ECU calibration, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
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Field reports and technical service bulletins highlight component wear patterns under high-load operation. Adherence to manufacturer service intervals and approved fluid specifications is critical for long-term reliability.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 YN offers good performance and efficiency but is prone to intake carbon buildup due to direct injection only. Early models (2012–2014) had problematic PCV hoses; 2015+ revisions improved vapour control. With regular oil changes (VW 502 00, every 15,000 km) and periodic intake cleaning, it can exceed 180,000 km reliably.
Top issues are intake valve carbon fouling, PCV hose cracking, turbo wastegate rattle, and high-pressure fuel pump wear. All are documented in Volkswagen SIB 2016‑09 and related TIS updates. Carbon buildup is worsened by short trips and poor fuel quality.
The YN appears in the Mk7 Golf (2012–2019), Polo (2014–2017), and across the VW Group—including SEAT Ibiza (2015–2017) and Škoda Fabia III (2015–2018)—all as the 1.4 TSI 125 PS variant. It was never used in North American or Chinese-market vehicles.
Aftermarket ECU tuning is common on the YN platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Efficient for its output: ~7.2 L/100km (city), ~4.8 L/100km (highway), or ~48 mpg UK combined. Real-world mixed driving typically yields 42–50 mpg UK. Fuel consumption rises with aggressive driving or frequent short trips due to turbo and direct injection dynamics.
Yes. The YN is an interference engine. If the timing chain fails or jumps, pistons will contact open valves, causing severe internal damage. While chain failure is rare, prompt attention to timing-related noises is essential.
Volkswagen specifies 5W‑40 synthetic oil meeting VW 502 00 standard. Do not use Longlife or ACEA C3 oils. Change every 15,000 km or annually to protect the turbo, chain, and reduce sludge that exacerbates PCV and carbon issues.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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.
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