The Vauxhall X 22 DTH is a 2,172 cc, inline‑four turbocharged diesel engine produced between 2006 and 2012. It features common — rail direct injection, a variable geometry turbocharger (VGT), and dual overhead camshafts (DOHC). In standard form it delivers 110 kW (150 PS) and 350 Nm of torque, offering strong low — end response and relaxed motorway cruising.
Fitted to mid — size models such as the Vectra C, Signum, and Zafira B—including the Vectra 2.2 CDTI 150 and Zafira 2.2 C…
All production years 2006–2012 meet Euro 5 emissions standards (VCA UK Type Approval #VCA/EMS/3321).
The Vauxhall X 22 DTH is a 2,172 cc inline‑four turbocharged diesel engineered for mid-size sedans, estates, and MPVs (2006–2012). It combines Bosch common-rail injection with a single variable-geometry turbocharger to deliver responsive low-RPM torque and efficient highway cruising. Designed to meet Euro 5 standards, it balances performance with urban compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,172 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged (VGT) | |
Bore × stroke | 86.0 mm × 94.6 mm | |
Power output | 110 kW (150 PS) | |
Torque | 350 Nm @ 2,000 rpm | |
Fuel system | Bosch CP3 common-rail (up to 1,600 bar) | |
Emissions standard | Euro 5 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable-geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted; low‑wear design) | |
Oil type | GM dexos2 (SAE 5W‑30) | |
Dry weight | 168 kg |
The Vauxhall X 22 DTH was used across Vauxhall's Vectra C, Signum, and Zafira B platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Signum for NVH control and unique exhaust manifolds in the Zafira—and from 2009 the introduction of updated fuel pump couplings, creating minor internal differences. All adaptations are documented in OEM technical bulletins.
The X 22 DTH's primary reliability risk is high-pressure fuel pump drive failure, with elevated incidence in pre-2009 builds subjected to frequent short trips or poor-quality diesel. Vauxhall internal data (2010) indicated a notable failure rate in early production engines before 120,000 km, while UK DVSA MOT records show increased DPF-related failures in high-mileage examples. Extended oil intervals and low-lubricity fuel accelerate wear in the CP3 system, making fuel quality and maintenance critical.
Analysis derived from Vauxhall technical bulletins (2007–2012) and UK DVSA failure statistics (2013–2023). 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 X 22 DTH offers strong torque and good refinement, but pre-2009 models are prone to high-pressure fuel pump coupling failures. Post-2009 Euro 5 variants are more robust. With regular oil changes (using GM dexos2) and high-quality EN 590 diesel, it can be dependable beyond 180,000 km. Avoid short-trip driving to support DPF health.
Top issues include high-pressure fuel pump coupling failure (pre-2009), DPF clogging, EGR cooler fouling, and minor oil leaks from cam/sump covers. These are documented in Vauxhall service bulletins TIS‑22DTH‑06 and TIS‑22DTH‑07. Most are manageable with proactive maintenance and quality fuel.
The X 22 DTH powered the Vectra C (2006–2008), Signum (2006–2008), and Zafira B (2006–2012) in 2.2 CDTI 150 variants. All models meet Euro 5 emissions standards and feature DOHC 16-valve architecture with VGT turbocharging.
Yes. Stage 1 ECU remaps typically yield +20–25 kW (175–180 PS) safely, as the stock internals handle moderate torque increases. Supporting mods like a DPF-back exhaust and intercooler improve reliability. Avoid aggressive tuning without fuel system upgrades due to CP3 pump sensitivity.
In a Vectra 2.2 CDTI 150, expect ~5.6 L/100km (highway) and ~7.4 L/100km (city), or about 48 mpg UK combined. Real-world mixed driving typically returns 44–50 mpg (UK), depending on driving style, DPF status, and tyre pressure.
Yes. The X 22 DTH is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. However, the front-mounted chain is robust—failures are rare with proper oil maintenance.
Vauxhall specifies GM dexos2 5W-30 synthetic oil. This formulation protects turbo bearings and meets low-SAPS requirements for emissions systems. Change every 15,000 km or annually, whichever comes first.
Comprehensive technical documentation and regulatory references
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VAUXHALL 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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