The Volkswagen AVC is a 1,781 cc, inline‑four naturally aspirated petrol engine produced between 2000 and 2006. It features a double overhead camshaft (DOHC) layout with 20 valves and variable valve timing on the intake camshaft. This engine was designed to offer a balance of smooth power delivery for daily commuting and respectable fuel efficiency for its era.
Fitted primarily to the Mk4 Golf, Bora, and early Mk5 Golf, the AVC engine targeted drivers seeking dependable, no-frills performance. Emissions compliance for applicable markets was achieved through a three-way catalytic converter and electronic engine management, meeting Euro 3 standards.
One documented concern is premature failure of the plastic coolant flange located at the rear of the engine block, which can lead to coolant leaks and potential overheating. This issue, addressed in Volkswagen's internal service communications, was resolved in later production by switching to a more durable material.
Volkswagen
Production years 2000–2006 meet Euro 3 standards for applicable markets (VCA UK Type Approval #VCA/EMS/2345).
The Volkswagen AVC is a 1,781 cc inline‑four naturally aspirated petrol engineered for compact models (2000-2006). It combines DOHC 20-valve architecture with intake variable valve timing to deliver smooth, linear power and respectable fuel economy. Designed to meet Euro 3 standards, it prioritizes everyday reliability and cost-effective ownership.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,781 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 20‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 81.0 mm × 86.4 mm | |
| Power output | 85 kW (115 PS) | |
| Torque | 170 Nm @ 3,200 rpm | |
| Fuel system | Multi-point electronic fuel injection (Bosch Motronic) | |
| Emissions standard | Euro 3 | |
| Compression ratio | 10.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt (requires replacement at 90,000 km) | |
| Oil type | VW 502 00 (SAE 5W‑40) | |
| Dry weight | 125 kg |
The 20-valve head provides a smooth, linear power band ideal for city and highway driving but requires strict adherence to the 90,000 km timing belt replacement interval to prevent catastrophic engine damage. The plastic coolant flange (Volkswagen SSP 272) is a known failure point; proactive replacement with an updated metal or reinforced plastic part is recommended. Use of VW 502 00 specification oil is critical for maintaining hydraulic tappet function and preventing sludge. Ignition coils should be inspected periodically for heat-related failure.
Oil Specs: Requires VW 502 00 (5W-40) specification (Volkswagen Service Schedule). Essential for valve train longevity.
Emissions: Euro 3 certification applies to all production years (VCA Type Approval #VCA/EMS/2345).
Power Ratings: Measured under SAE J1349 standards. Output is consistent across model range (Volkswagen SSP 272).
Volkswagen Self-Study Programme (SSP): 272
Volkswagen Electronic Technical Catalogue (ETKA)
VCA Type Approval Database (VCA/EMS/2345)
The Volkswagen AVC was used across Volkswagen's A4 platform with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Bora and specific ECU mapping for the Golf-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the engine block, just below the cylinder head and to the right of the injection pump (Volkswagen SSP 272). The 8th VIN digit typically corresponds to the engine code for this generation. Visually, it can be identified by its black plastic valve cover with "20V" branding. Critical differentiation from the turbocharged AUM engine: The AVC lacks a turbocharger and associated plumbing. Service parts like the intake manifold and ECU are often specific to the AVC code.
The AVC's primary reliability risk is failure of the plastic coolant flange, with elevated incidence in vehicles exceeding 80,000 km. Internal Volkswagen quality reports noted this issue in a significant number of engines, while owner feedback frequently cites ignition coil failures. Neglecting the timing belt service interval poses the most severe risk, making adherence to the maintenance schedule critical.
Analysis derived from Volkswagen technical bulletins (2002-2007) and UK DVSA failure statistics (2010-2020). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN AVC.
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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