The Volkswagen ARX is a 1,968 cc, inline‑four turbo‑diesel engine produced between 2008 and 2015. It features a double overhead camshaft (DOHC) design, common rail direct injection, and a variable geometry turbocharger (VGT), delivering outputs between 103–125 kW (140–170 PS) and 320–350 Nm of torque. The VGT enables strong low — rpm torque for effortless overtaking and towing.
Fitted to models such as the Mk6 Golf, Jetta, Passat B7, and Tiguan, the ARX was engineered fo…
Volkswagen
Production years 2008–2015 meet Euro 5 standards .
The Volkswagen ARX is a 1,968 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2008-2015). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and efficient cruising. Designed to meet Euro 5 standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,968 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 81.0 mm × 95.5 mm | |
Power output | 103–125 kW (140–170 PS) | |
Torque | 320–350 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CP4 common‑rail (up to 1,800 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 16.2:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Honeywell) | |
Timing system | Chain (maintenance-free design) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 158 kg |
The Volkswagen ARX was used across Volkswagen's A5/B7 platforms with transverse mounting. This engine received platform-specific adaptations-reinforced mounts in the Tiguan and specific ECU mappings for the Passat-creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
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The ARX's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using non-specified fuel or oil. Volkswagen internal data indicated a notable failure rate for early-production pumps, while adherence to VW 507 00 oil specification and EN 590 fuel standards is critical for long-term pump health.
Analysis derived from manufacturer technical service bulletins and industry workshop records. 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 ARX is generally robust with strong performance, but its Achilles' heel is the high-pressure fuel pump, particularly in early models. Using the correct VW 507 00 oil and high-quality diesel fuel is paramount for longevity. With proper maintenance, these engines can easily exceed 200,000 km without major issues.
The most frequent issues are high-pressure fuel pump failure, EGR system clogging, turbo actuator faults, and intake manifold flap motor failures. These are well-documented in Volkswagen service bulletins and are often linked to maintenance or fuel quality.
The ARX 2.0 TDI was used in the Golf Mk6 (2008-2013), Jetta Mk6 (2010-2013), Passat B7 (2010-2015), and Tiguan Mk1 (2008-2015). It was typically found in 140 PS and 170 PS variants across these models.
Aftermarket ECU tuning is common on the ARX platform, but increasing boost or altering engine parameters accelerates component wear, impacts emissions compliance, and may void vehicle warranties. Any modifications should be evaluated carefully by a qualified specialist.
Excellent. In a Golf or Jetta, expect 5.0-5.5 L/100km (50-56 mpg UK) on the highway and 6.5-7.5 L/100km (37-43 mpg UK) in the city. Combined figures typically range from 5.5-6.0 L/100km (47-51 mpg UK), depending on the model and driving style.
Yes. The ARX, like virtually all modern engines, is an interference design. If the timing chain were to fail (though it's designed to be maintenance-free), it would likely cause catastrophic valve and piston damage.
Volkswagen mandates the use of oil meeting the VW 507 00 specification, typically a 5W-30 synthetic. Using this specific oil is critical for protecting the high-pressure fuel pump and ensuring the DPF functions correctly. Change intervals should not exceed 15,000 km or 1 year.
Comprehensive technical documentation and regulatory references
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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
Type-approval guidance and documentation.
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