The Vauxhall Z22YH is a 2,198 cc, V6 turbocharged petrol engine produced between 2003 and 2008. It features a 24‑valve DOHC layout, sequential multi‑point fuel injection, and a single turbocharger with air — to — air intercooler. In standard form it delivers 154–177 kW (210–240 PS) and 320–350 Nm of torque, offering strong performance with refined mid — range response.
Fitted to the Vectra C GSi and Signum GSi, the Z22YH was engineered for high — performance driving while ma…
All production years (2003–2008) meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/2789).
The Vauxhall Z22YH is a 2,198 cc V6 turbocharged petrol engine engineered for performance sedans and estates (2003–2008). It combines sequential multi-point injection with a single turbocharger and intercooler to deliver strong low-to-mid range torque and high-rpm power. Designed to meet Euro 4 emissions standards, it balances sporty dynamics with executive refinement.
| Parameter | Value | Source |
|---|---|---|
Displacement | 2,198 cc | |
Fuel type | Petrol | |
Configuration | V6, DOHC, 24‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 86.0 mm × 94.6 mm | |
Power output | 154–177 kW (210–240 PS) | |
Torque | 320–350 Nm @ 2,000–4,800 rpm | |
Fuel system | Sequential multi-point injection (Bosch ME7.6.3) | |
Emissions standard | Euro 4 | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single turbo (Garrett GT2560R) | |
Timing system | Chain (front‑mounted, dual-stage) | |
Oil type | GM dexos1 (SAE 5W‑40) | |
Dry weight | 172 kg |
The Vauxhall Z22YH was used across Vauxhall's Vectra C and Signum GSi platforms with longitudinal mounting and shared with Opel under GM's global performance architecture. This engine received platform-specific adaptations—reinforced subframes in the Vectra estate and upgraded cooling in the Signum—and from 2006 the turbo oil system update per TSB‑07‑034, creating minor interchange considerations. All adaptations are documented in OEM technical bulletins.
The Z22YH's primary reliability risk is turbocharger bearing wear in early builds, with elevated incidence in high-mileage or track-driven vehicles. Vauxhall internal data from 2008 indicated a notable share of pre-2006 engines requiring turbo replacement before 120,000 km, while UK DVSA records show no significant emissions-related MOT failures linked to this engine. Extended high-load operation without proper cooldown and poor oil quality accelerate turbo degradation, making maintenance discipline critical.
Analysis derived from Vauxhall technical bulletins (2007–2008) and UK DVSA failure statistics (2015–2023). 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 Z22YH offers strong performance and refinement, but early models (2003–2005) had turbo bearing reliability concerns. Post-2006 revisions significantly improved durability. With proper maintenance—using GM dexos1 (5W-40) oil and RON 98 petrol—and avoiding excessive short trips, the engine can be robust beyond 200,000 km.
Top issues include turbocharger bearing wear, timing chain tensioner wear, intercooler hose detachment, and ignition coil failures. These are documented in Vauxhall TSB‑07‑034 and service records. Most risks are mitigated with correct oil, fuel, and driving habits.
The Z22YH powered the Vectra C GSi (2003–2008) and Signum GSi (2003–2008) in the UK, both as 2.2 Turbo GSi variants with 240 PS. It was also used in Opel Vectra C GSi across Europe. No naturally aspirated or diesel variants share this engine code.
Yes. Stage 1 ECU remaps typically yield +20–30 kW safely, as the stock internals handle torque well. Supporting upgrades (intercooler, downpipe, exhaust) can push output beyond 270 PS. However, turbo and oil system reliability must be verified before aggressive tuning, especially on pre-2006 units.
Real-world consumption is ~12.8 L/100km (city) and ~8.2 L/100km (highway), or ~22 mpg UK combined in the Vectra GSi. Aggressive driving reduces this to ~19 mpg, while gentle highway use can reach 28 mpg. Premium fuel requirement increases running costs.
Yes. The Z22YH is an interference engine. If the timing chain fails or jumps, piston-to-valve contact can cause catastrophic damage. However, the front-mounted dual-stage chain is generally robust with proper oil changes and has no widespread failure history.
Vauxhall specifies GM dexos1 (SAE 5W‑40) synthetic oil. This is critical for turbo bearing protection and timing system longevity. Oil changes should occur every 10,000 km or 12 months. Using non-dexos1 oil risks accelerated wear and oil coking.
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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