The Vauxhall A22DMH is a 2,198 cc, inline‑four naturally aspirated petrol engine produced between 2017 and 2023. It features a dual overhead camshaft (DOHC) 16‑valve layout with direct fuel injection and variable valve timing on both intake and exhaust camshafts. In standard form it delivered 125 kW (170 PS) at 6,000 rpm and 225 Nm of torque at 4,000 rpm, offering smooth power delivery suited to mid‑size vehicles.
Fitted to models such as the Insignia B and Grandland X—including the 2.2 Ultimate and 2.2 GS variants—the A22DMH was engineered for refined performance and responsive drivability. Emissions compliance was achieved through gasoline particulate filtration (GPF), precise direct injection control, and exhaust after‑treatment, allowing it to meet Euro 6d‑TEMP standards across all production years.
One documented concern is carbon buildup on intake valves due to the absence of port fuel injection, particularly in vehicles subjected to frequent short trips. This issue, highlighted in Vauxhall Service Information Bulletin SIB‑17‑09‑21, is attributed to fuel and oil vapour deposits accumulating on valve stems over time. Affected engines exhibit rough idle, hesitation, and reduced volumetric efficiency.
All production years 2017–2023 meet Euro 6d-TEMP standards (VCA UK Type Approval #VCA/EMS/9235).
The Vauxhall A22DMH is a 2,198 cc inline‑four naturally aspirated petrol engine engineered for mid‑size sedans, estates, and SUVs (2017–2023). It combines direct fuel injection with dual‑VVT to deliver linear power delivery and refined operation. Designed to meet Euro 6d‑TEMP emissions standards, it balances performance with modern regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,198 cc | |
| Fuel type | Petrol (Unleaded) | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 86.0 mm × 94.6 mm | |
| Power output | 125 kW (170 PS) @ 6,000 rpm | |
| Torque | 225 Nm @ 4,000 rpm | |
| Fuel system | Direct injection (Bosch HDEV6) | |
| Emissions standard | Euro 6d-TEMP | |
| Compression ratio | 11.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain‑driven DOHC | |
| Oil type | Vauxhall GM‑LL‑A‑025 (SAE 5W‑30) | |
| Dry weight | 128 kg |
The naturally aspirated design provides smooth, linear power delivery ideal for highway cruising but requires adherence to 15,000 km oil change intervals using GM‑LL‑A‑025–approved oil to protect the timing chain and valve train. Short urban trips without full warm-up accelerate carbon buildup on intake valves due to the lack of port injection. The Bosch HDEV6 injectors demand high-quality EN 228 petrol to prevent coking. Gasoline particulate filter (GPF) regeneration occurs passively during normal driving; extended city use may require occasional highway runs. Post-2020 units feature updated valve stem seals per SIB‑17‑09‑21 to reduce oil vapour ingress.
Oil Specs: Requires GM‑LL‑A‑025 specification (Vauxhall Owner’s Manual 2017). Equivalent to ACEA A3/B4.
Emissions: Euro 6d-TEMP certification applies to all 2017–2023 models (VCA Type Approval #VCA/EMS/9235). No market variations.
Power Ratings: Measured under ISO 1585 standards. Output verified across Insignia B and Grandland X applications (Vauxhall PT‑2017).
Vauxhall Technical Information System (TIS): Docs T17‑446, SIB 17‑09‑21
VCA Type Approval Database (VCA/EMS/9235)
ISO 1585: Road vehicles — Engine test code
The Vauxhall A22DMH was used across Vauxhall's E2XX and EMP2 platforms with transverse mounting and no external licensing. This engine received platform-specific adaptations—revised engine mounts in the Grandland X and modified intake manifold routing in the Insignia B—and from 2020 the facelifted Insignia B models retained the same engine code but updated ECU calibrations for improved GPF management, creating minor software interchange limits. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front face of the cylinder block near the timing cover (Vauxhall TIS T17‑446). The 8th VIN digit indicates engine displacement ('2' for 2.2L). All A22DMH units feature black plastic cam covers with '2.2' embossing. Critical differentiation from turbocharged variants: A22DMH lacks turbo plumbing and uses a single exhaust manifold. ECU part number begins with '1378475' for pre‑2020 units and '1379012' for post‑GPF‑update. Service parts require calibration verification—throttle bodies and injectors are not interchangeable across ECU generations (Vauxhall SIB 18‑10‑22).
The A22DMH's primary reliability risk is intake valve carbon buildup, with elevated incidence in high-mileage vehicles used primarily for short urban trips. Vauxhall internal field data from 2021 indicated performance degradation in a notable subset of engines exceeding 80,000 km without highway driving, while UK DVSA MOT records show secondary failures linked to misfire-related emissions faults. Cold-start cycles without full warm-up increase deposit formation, making driving pattern and fuel quality critical.
Analysis derived from Vauxhall technical bulletins (2017–2022) and UK DVSA failure statistics (2020–2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about VAUXHALL A-22-DMH.
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