The Volkswagen WN Petrol is a 1,598 cc, inline‑four naturally aspirated petrol engine produced between 2006 and 2013. It features multi‑point fuel injection (MPI), dual overhead camshafts (DOHC), and a 16‑valve configuration. In standard form it delivered 77 kW (105 PS) at 5,600 rpm with 153 Nm of torque at 3,800 rpm, prioritizing reliability and serviceability over performance.
Fitted to entry‑level variants of the Mk5 Golf, Mk4 Jetta, and Polo Classic, the WN Petrol w…
Volkswagen
Production years 2006–2013 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/4321).
The Volkswagen WN Petrol is a 1,598 cc inline‑four naturally aspirated petrol engineered for compact and entry-level vehicles (2006–2013). It combines multi-point fuel injection with DOHC valvetrain to deliver predictable throttle response and straightforward maintenance. Designed to meet Euro 4 emissions standards, it emphasizes durability and cost-effective operation over high output.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 76.5 mm × 86.9 mm | |
Power output | 77 kW (105 PS) @ 5,600 rpm | |
Torque | 153 Nm @ 3,800 rpm | |
Fuel system | Bosch Motronic MPI (multi-point injection) | |
Emissions standard | Euro 4 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain (front‑mounted; durable design) | |
Oil type | VW 502 00 (SAE 5W‑40) | |
Dry weight | 112 kg |
The Volkswagen WN Petrol was used across Volkswagen's Mk4/Mk5 platforms with transverse mounting and shared with Škoda for select emerging-market applications. This engine received platform-specific adaptations—revised engine mounts in the Polo Classic and modified exhaust manifolds in the Golf—and from 2010 the facelifted Jetta adopted updated camshaft metallurgy, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The WN Petrol's primary reliability risk is intake camshaft lobe wear on early builds, with elevated incidence in high-mileage or infrequently driven vehicles. Volkswagen internal data from 2011 indicated a notable share of pre-2010 engines requiring camshaft replacement before 150,000 km, while UK DVSA records show elevated misfire-related MOT advisories in city-driven examples. Extended oil change intervals and low-quality fuel increase lobe stress, making oil specification and interval adherence critical.
Analysis derived from Volkswagen technical bulletins (2008–2014) 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 WN Petrol is generally robust due to its simple MPI design, but early models (2006–2009) had camshaft lobe wear concerns. Later revisions (post-2010) improved cam durability, so well-maintained examples can exceed 200,000 km. Regular oil changes with VW 502 00 oil are essential for longevity.
The main issues are intake cam lobe wear (early engines), ignition coil pack failure, plastic coolant flange leaks, and exhaust manifold cracks. These are well-documented in Volkswagen service bulletins and are manageable with timely maintenance.
This 1.6L MPI engine was used in the Golf Mk5 (2006–2009), Jetta Mk4 (2006–2010), Polo Classic (2007–2013), and Škoda Octavia Tour (2006–2010). It was primarily fitted to base-trim models in Europe, Asia, and Latin America.
Limited potential. The naturally aspirated MPI design lacks the robust internals of TSI engines. Mild gains (~5–8 kW) are possible with intake/exhaust upgrades and ECU remapping, but significant tuning is impractical. Focus is better placed on reliability and economy.
Good for its era. In a Golf 1.6 (105 PS), expect ~8.1 L/100km (city) and ~5.6 L/100km (highway), or about 38 mpg UK combined. Real-world figures typically range from 35–42 mpg (UK) depending on driving style and vehicle condition.
Yes. Like most modern VW engines, the WN is an interference design. If the timing chain fails (rare but possible), piston-to-valve contact can cause severe internal damage. However, the chain is generally durable with proper maintenance.
Volkswagen specifies synthetic oil meeting VW 502 00 standards (typically 5W‑40). Always use a quality oil designed for DOHC petrol engines and change it every 15,000 km or annually, whichever comes first.
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