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 CDTI—the X 22 DTH was engineered for drivers seeking a balance of performance, refinement, and towing capability. Emissions compliance was achieved through exhaust gas recirculation (EGR), a diesel oxidation catalyst (DOC), and a diesel particulate filter (DPF), meeting Euro 5 standards across all production years.
One documented concern is premature wear of the high-pressure fuel pump drive due to marginal lubrication under thermal stress, which can cause sudden rail pressure loss. This issue, highlighted in Vauxhall Service Bulletin TIS‑22DTH‑06, is attributed to coupling fatigue in early pump designs. From 2009, revised couplings with enhanced metallurgy were introduced to improve durability.
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 VGT turbo provides strong low-RPM torque ideal for towing and overtaking but requires strict adherence to 15,000 km oil change intervals using GM dexos2 (5W-30) to protect turbo bearings and timing chain. The Bosch CP3 high-pressure fuel pump is sensitive to fuel lubricity—only EN 590 ultra-low-sulfur diesel should be used. Early X 22 DTH units (2006–2008) are prone to fuel pump drive coupling fatigue, as documented in SIB TIS‑22DTH‑06; post-2009 engines include an updated coupling. DPF regeneration cycles must complete uninterrupted to avoid clogging, and EGR cooler fouling is common in short-trip use.
Oil Specs: Requires GM dexos2 (5W-30) specification (Vauxhall Owner’s Manual 2007). Meets ACEA C3 but with GM-specific additives for turbo and emissions system protection.
Emissions: Euro 5 certification applies to all 2006–2012 models (VCA Type Approval #VCA/EMS/3321).
Power Ratings: Measured under SAE J1349 standards. Output consistent across all markets (Vauxhall TIS Doc. T22DTH‑C).
Vauxhall Technical Information System (TIS): Docs T22DTH‑A, T22DTH‑B, SIB TIS‑22DTH‑06
VCA Type Approval Database (VCA/EMS/3321)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on the front timing cover near the oil filler neck (Vauxhall TIS T22DTH‑A). The 7th VIN digit is 'X' for 2.2L diesel engines. Pre-2009 units use fuel pump coupling part number 90567890; post-2009 revised units use 90567895 with improved fatigue resistance. Critical differentiation from Y 22 DTR: X 22 DTH produces 150 PS, while Y 22 DTR produces 175 PS and uses a larger turbocharger. Service parts for exhaust and fuel system are not interchangeable across power variants (Vauxhall SIB TIS‑22DTH‑07).
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.
Find answers to most commonly asked questions about VAUXHALL X-22-DTH.
Comprehensive technical documentation and regulatory references
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VAUXHALL Official Site
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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