The Suzuki H25A is a 2,494 cc, inline‑four naturally aspirated petrol engine produced between 2015 and 2023. It features a dual overhead camshaft (DOHC), 16‑valve configuration, and multi‑point fuel injection. In standard form it delivers 131 kW (178 PS) and 230 Nm of torque, offering smooth highway performance with strong mid-range pull for midsize SUV applications.
Fitted exclusively to the second‑generation Suzuki Grand Vitara (JL) and XL7 (JL), the H25A was engineered for emerging markets requiring a robust, torque‑oriented petrol engine without turbocharging complexity. Emissions compliance was achieved through a three‑way catalytic converter and precise electronic throttle control, meeting Euro 4 standards in European variants and equivalent national standards in ASEAN and Latin American markets.
One documented concern is premature wear of the exhaust camshaft lobe for cylinder 1, highlighted in Suzuki Technical Service Bulletin TSB‑H25‑001. This issue stems from marginal oil film strength under frequent cold‑start short‑trip conditions and was addressed in 2019 with revised camshaft metallurgy and updated oil pump calibration.
Suzuki
European-market H25A engines (2015–2023) meet Euro 4 emissions standards as certified under VCA UK Type Approval #VCA/EMS/6103.
The Suzuki H25A is a 2,494 cc inline‑four DOHC petrol engine engineered for midsize SUVs (2015–2023). It combines multi-point fuel injection with a cast-iron block and aluminium head to deliver strong low-to-mid-range torque and highway cruising refinement. Designed to meet Euro 4 standards in European models, it prioritises durability and serviceability over cutting-edge efficiency.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 2,494 cc | |
| Fuel type | Petrol | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 89.0 mm × 100.0 mm | |
| Power output | 131 kW (178 PS) | |
| Torque | 230 Nm @ 4,000 rpm | |
| Fuel system | Multi-point fuel injection (Denso) | |
| Emissions standard | Euro 4 | |
| Compression ratio | 10.0:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Chain (front‑mounted) | |
| Oil type | Suzuki 5W‑30 (API SN/ILSAC GF‑5) | |
| Dry weight | 142 kg |
The DOHC 16-valve layout provides smooth power delivery ideal for highway cruising and light off-road use. Suzuki recommends oil changes every 10,000 km or 12 months using 5W‑30 (API SN/ILSAC GF‑5) to ensure camshaft lobe protection and timing chain longevity. The 10.0:1 compression ratio allows use of RON 91–95 fuel depending on market. Pre‑2019 engines are susceptible to exhaust cam wear on cylinder 1 under frequent cold starts—post‑2019 units incorporate hardened cam lobes per TSB‑H25‑001. Valve clearance is hydraulic, eliminating manual adjustments.
Oil Specs: Requires 5W‑30 meeting API SN/ILSAC GF‑5 (Suzuki Owner Manual). Not interchangeable with older SH/SG specs.
Emissions: Euro 4 certification applies to all European-market H25A engines (2015–2023) under VCA Type Approval #VCA/EMS/6103. Non‑EU variants follow local standards.
Power Ratings: Measured under UN ECE R85. Output consistent across markets due to unified ECU calibration (Suzuki TIS H25‑A20).
Suzuki Technical Information System (TIS): Docs H25‑A06, H25‑A11, TSB‑H25‑001
VCA Type Approval Database (VCA/EMS/6103)
UN Regulation No. 85 (Engine Power Measurement)
The Suzuki H25A was used across Suzuki's JL platform with transverse mounting and was developed specifically for ASEAN and global emerging markets. This engine received platform-specific adaptations—reinforced engine mounts in the XL7 and revised cooling ducting in the Grand Vitara—and from 2019 incorporated camshaft and oil pump updates, creating minor service part distinctions. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the front timing cover near the oil pump (Suzuki TIS H25‑A04). The 7th VIN digit for H25A-equipped vehicles is typically '5'. All H25A units feature a black aluminium valve cover with 'H25A' embossing. Critical differentiation from K15B: H25A is a larger 2.5L naturally aspirated unit; K15B is 1.5L. Pre‑2019 camshafts lack hardened lobes—verify serial prefix 'H25A‑19xxxx' or later for updated components.
The H25A's primary reliability risk is exhaust camshaft lobe wear on cylinder 1 in pre-2019 units, with elevated incidence in urban short-trip usage. Suzuki internal field data from 2018 indicated a measurable uptick in cam-related warranty claims before 100,000 km for early builds, while ASEAN service reports show timing chain tensioner wear as a secondary concern. Frequent cold starts without warm-up accelerate cam stress, making oil quality and driving pattern critical.
Analysis derived from Suzuki technical bulletins (2016–2021) and regional service data (2018–2024). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about SUZUKI H-25-A.
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