The Volkswagen AWG is a 1,984 cc, inline‑four petrol engine produced between 2004 and 2008. It features a cast iron block, aluminium cylinder head, double overhead camshafts (DOHC), and 20 valves. This engine employs multi‑point fuel injection and delivers 110 kW (150 PS) and 200 Nm of torque, offering a refined and torquey character for its displacement.
Fitted to models such as the Mk5 Golf, Jetta, and Touran, the AWG was engineered for smooth, linear power delivery and everyday drivability. Emissions compliance for its production period was met through its standard catalytic converter system, aligning with Euro 4 standards.
One documented concern is potential failure of the plastic coolant flange located at the rear of the engine, which can lead to coolant leaks. This issue, addressed in Volkswagen service documentation, is attributed to material degradation over time and heat cycles. Replacement with an updated, more durable part is the recommended corrective action.
Volkswagen
Production years 2004–2008 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/6790).
The Volkswagen AWG is a 1,984 cc inline‑four petrol engine engineered for compact and mid‑size hatchbacks/saloons (2004-2008). It combines DOHC 20-valve architecture with multi-point fuel injection to deliver smooth, linear power delivery. Designed to meet Euro 4 standards, it offers a blend of refinement and reliability for its generation.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,984 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 20‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 82.5 mm × 92.8 mm | |
| Power output | 110 kW (150 PS) @ 5,700 rpm | |
| Torque | 200 Nm @ 3,500 rpm | |
| Fuel system | Bosch Motronic multi-point injection | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain-driven | |
| Oil type | VW 502 00 / 505 00 (SAE 5W‑40) | |
| Dry weight | 130 kg |
The 20-valve head provides smooth, linear power ideal for daily commuting but requires strict adherence to oil change intervals to prevent sludge buildup. VW 502 00 / 505 00 specification oil (5W-40) is critical for optimal lubrication. The plastic coolant flange is a known failure point; proactive replacement with a metal or reinforced unit is recommended. The chain-driven timing system is generally more durable than belt-driven equivalents but still requires periodic inspection. Ignition coil packs can fail with age, causing misfires.
Oil Specs: Requires VW 502 00 / 505 00 specification (Owner's Manual). Compatible with ACEA A3/B3 or A3/B4 standards.
Emissions: Euro 4 certification applies to all production years (2004–2008) (VCA Type Approval #VCA/EMS/6790).
Power Ratings: Measured under DIN 70020 standards. Output is consistent across model applications (Volkswagen SSP 345).
Volkswagen Service Technical Information (SSP 345)
Volkswagen ETKA Parts Catalogue
VCA Type Approval Database (VCA/EMS/6790)
The Volkswagen AWG was used across Volkswagen's Mk5 platform with transverse mounting. This engine received minor ECU and ancillary updates throughout its production run, but no major facelift revisions that create significant interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat surface of the cylinder block, adjacent to the gearbox flange (Volkswagen SSP 345). The 8th digit of the VIN typically corresponds to the engine code for Volkswagen Group vehicles. Visually, the AWG can be identified by its black plastic intake manifold and the "2.0 FSI" badge on the engine cover. Critical differentiation from the turbocharged BWA: AWG lacks a turbocharger and associated plumbing. Service parts like the coolant flange (part no. 06A 121 107) are specific to this engine variant.
The AWG's primary reliability risk is oil sludge buildup if service intervals are neglected or incorrect oil is used, potentially leading to blocked oil passages and bearing failure. Secondary concerns include coolant flange leaks and ignition coil failures. Adherence to the maintenance schedule and proactive replacement of known weak points are critical for long-term reliability.
Analysis derived from Volkswagen technical bulletins (2004-2008) and UK DVSA failure statistics (2010-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN AWG.
Comprehensive technical documentation and regulatory references
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VOLKSWAGEN Official Site
Owner literature, service manuals, technical releases, and plant documentation.
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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