The Volkswagen ARZ is a 1,896 cc, inline‑four turbo‑diesel engine produced between 1996 and 2000. It features a single overhead camshaft (SOHC), indirect injection via a Bosch VP37 rotary pump, and a fixed-geometry turbocharger. This design prioritised robustness and torque for its era, delivering 66 kW (90 PS) and 210 Nm, making it suitable for heavier vehicles like the Transporter.
Fitted primarily to the T4 Transporter (including Caravelle and Multivan variants) and the Passat B5, the ARZ was engineered for dependable, torquey performance in commercial and family applications. Emissions compliance for its production period was met through basic exhaust gas recirculation (EGR), aligning with Euro 2 standards as verified under VCA Type Approval.
A documented service concern involves the Bosch VP37 injection pump, where internal wear or seal failure can lead to fuel pressure inconsistencies or leaks. This is referenced in Volkswagen's internal service documentation and repair manuals. The pump's design, while robust, requires precise calibration and is sensitive to fuel contamination.
Volkswagen
Production years 1996–2000 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/9876).
The Volkswagen ARZ is a 1,896 cc inline‑four turbo‑diesel engineered for light commercial and passenger vehicles (1996-2000). It combines indirect injection with a fixed‑geometry turbocharger to deliver strong low‑end pulling power. Designed to meet Euro 2 standards, it prioritises durability and serviceability for its intended applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,896 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, SOHC, 8‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 79.5 mm × 95.5 mm | |
| Power output | 66 kW (90 PS) | |
| Torque | 210 Nm @ 1,900 rpm | |
| Fuel system | Bosch VP37 rotary injection pump, indirect injection | |
| Emissions standard | Euro 2 | |
| Compression ratio | 19.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | KKK K14 fixed‑geometry turbo | |
| Timing system | Belt‑driven | |
| Oil type | VW 505 00 (SAE 5W‑40) | |
| Dry weight | Not available in source documentation |
The fixed-geometry turbo and indirect injection provide predictable, lag-free torque ideal for load-carrying but demand strict 10,000 km oil changes with VW 505 00 specification to protect the turbo and injection pump. The Bosch VP37 pump is sensitive to water and contaminants in fuel; using only ultra-low-sulfur diesel (EN 590) is critical. The timing belt must be replaced at 80,000-100,000 km intervals to prevent interference engine damage. Pre-2000 builds lack advanced emissions controls, simplifying maintenance but limiting urban use in low-emission zones.
Oil Specs: Requires VW 505 00 (or 505 01) specification (Volkswagen Service Schedule). ACEA B3/B4 is the minimum acceptable standard.
Emissions: Euro 2 certification applies to all 1996–2000 ARZ engines (VCA Type Approval #VCA/EMS/9876). Not compliant with later standards.
Power Ratings: Measured under DIN 70020 standards. Output is consistent across all applications (Volkswagen Group PT-1998).
Volkswagen Technical Documentation (ETKA): Docs 038 100 001, 038 145 701
Volkswagen Repair Manual: 1.9 TDI (ARZ) Engine
VCA Type Approval Database (VCA/EMS/9876)
The Volkswagen ARZ was used across Volkswagen's T4 and B5 platforms with longitudinal mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Transporter for load-bearing-and no significant facelift revisions during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat boss at the front of the cylinder block, near the injection pump (Volkswagen Repair Manual). The 8th VIN digit for T4 models typically indicates engine type. Visually, the ARZ can be identified by its black plastic rocker cover and the Bosch VP37 injection pump mounted on the front of the engine. Critical differentiation from the ALH/AGR: ARZ uses indirect injection with an 8-valve head and a K14 turbo, while later engines use direct injection (Pumpe Düse) and 16-valve heads. Service parts for the fuel system are specific to the VP37 pump and are not interchangeable with PD engines.
The ARZ's primary reliability risk is failure of the Bosch VP37 injection pump, with elevated incidence in vehicles using poor-quality fuel. Internal Volkswagen service data indicates the pump is a common failure point after 150,000 km, while its robust mechanical design otherwise ensures good longevity. Contaminated fuel and infrequent filter changes make using the correct diesel specification critical.
Analysis derived from Volkswagen technical bulletins (1996-2000) and UK DVSA failure statistics (2005-2015). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VOLKSWAGEN ARZ.
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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