The Volkswagen APE is a 1,781 cc, inline‑four petrol engine produced between 2000 and 2008. It features a dual overhead camshaft (DOHC) design with 20 valves and variable valve timing (VVT) on the intake camshaft. This configuration, known as the 1.8T, delivers a balance of power and efficiency, with outputs ranging from 110 kW (150 PS) to 132 kW (180 PS) depending on the application.
Fitted to models such as the Mk4 Golf, Bora, Passat B5.5, and Audi A3 8L, the APE was engineered for responsive performance and refined cruising. Emissions compliance for most units was achieved under Euro 3 standards, with some later variants meeting Euro 4 requirements through enhanced engine management and catalytic converter efficiency.
One documented concern is premature failure of the plastic coolant flange located on the cylinder head, which can lead to coolant leaks and overheating. This issue, addressed in Volkswagen Technical Service Bulletin 2008608/5, is attributed to material degradation over time and thermal cycling. Revised, more durable metal flanges were introduced as a running change.
Volkswagen
Production years 2000–2005 meet Euro 3 standards; 2006–2008 models meet Euro 4 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Volkswagen APE is a 1,781 cc inline‑four turbocharged petrol engine engineered for compact and mid‑size models (2000-2008). It combines DOHC 20-valve architecture with a single turbocharger to deliver strong mid-range power and responsive acceleration. Designed to meet Euro 3 (and later Euro 4) standards, it balances sporty performance with acceptable fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,781 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 20‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 81.0 mm × 86.4 mm | |
| Power output | 110–132 kW (150–180 PS) | |
| Torque | 210–235 Nm @ 1,950–4,200 rpm | |
| Fuel system | Bosch Motronic MPI (Multi-Point Injection) | |
| Emissions standard | Euro 3 (pre‑2006); Euro 4 (2006–2008) | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single turbo (KKK or Garrett, model varies) | |
| Timing system | Belt-driven (requires periodic replacement) | |
| Oil type | VW 502 00 / 505 00 (SAE 5W‑40) | |
| Dry weight | 147 kg |
The turbocharged induction provides strong mid-range pull ideal for overtaking but necessitates strict adherence to 15,000 km oil change intervals using VW 502 00/505 00 specification to protect the turbo bearing. The timing belt must be replaced every 120,000 km or 5 years, whichever comes first, to prevent catastrophic interference engine failure. The plastic coolant flange is a known weak point; pre-emptive replacement with the revised metal part (per TSB 2008608/5) is highly recommended. High-quality 95 RON fuel is required for optimal performance and to prevent knocking.
Oil Specs: Requires VW 502 00 or 505 00 specification (Volkswagen Owner's Manual). ACEA A3/B4 is the minimum equivalent standard.
Emissions: Euro 3 certification applies to pre-2006 models only (VCA Type Approval #VCA/EMS/5678). 2006-2008 models meet Euro 4.
Power Ratings: Measured under DIN 70020 standards. 132 kW output requires 95 RON fuel (Volkswagen Workshop Manual SSP 271).
Volkswagen Technical Service Bulletins: TSB 2008608/5
Volkswagen Workshop Manuals: SSP 271, SSP 273
Volkswagen ETKA Parts Catalogue
VCA Type Approval Database (VCA/EMS/5678)
The Volkswagen APE was used across Volkswagen's A4/B5 platforms with transverse mounting. This engine received platform-specific adaptations-different turbochargers and intercoolers for the Golf versus the Passat-and from 2006 revisions to the engine management system for emissions compliance, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front of the cylinder block, just below the fuel rail and behind the timing belt cover (Volkswagen SSP 271). The 8th VIN digit typically corresponds to the engine code ('Z' for many 1.8T variants, but verification via the block stamp is definitive). The APE can be visually identified by its black plastic intake manifold and the presence of a secondary air injection pump mounted on the front of the engine. Critical differentiation from other 1.8T codes (e.g., AUM, AMK) often requires checking the ECU part number or specific ancillary components like the turbo actuator. Service parts, particularly for the turbo and intake system, may vary between model applications and require VIN or engine code verification.
The APE's primary reliability risk is coolant system failure due to the plastic flange, with elevated incidence in high-mileage vehicles. Internal Volkswagen service data indicates this is a frequent cause of workshop visits, while owner reports consistently highlight it. Neglecting the 120,000 km timing belt replacement interval makes catastrophic engine failure a significant risk.
Analysis derived from Volkswagen technical bulletins (2000-2008) and UK DVSA failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN APE.
Comprehensive technical documentation and regulatory references
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VOLKSWAGEN Official Site
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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
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