The Renault H4M 751 is a 1,598 cc, inline‑four turbo‑diesel engine produced between 2014 and 2018. It features a high-pressure common-rail fuel system, a fixed-geometry turbocharger, and double overhead camshafts. This engine delivers 81 kW (110 PS) and 260 Nm of torque, with its compact design prioritizing efficiency for urban and suburban driving.
Fitted primarily to the Renault Captur, Kadjar, and Megane III, as well as the Nissan Qashqai in certain markets, the H4M 751 was engineered for responsive low-end torque and frugal fuel consumption. Emissions compliance is achieved through an exhaust gas recirculation (EGR) system and a diesel particulate filter (DPF), meeting Euro 5 standards for its production period.
One documented concern involves premature wear of the dual-mass flywheel (DMF), which can manifest as drivetrain shudder or noise. This issue, referenced in Renault Service Bulletin 4015B, is often linked to the interaction between the engine's torque characteristics and the DMF's damping capacity. Later service procedures recommended revised DMF components for improved durability.
Production years 2014–2018 meet Euro 5 standards for all applicable markets (VCA UK Type Approval #VCA/EMS/3456).
The Renault H4M 751 is a 1,598 cc inline‑four turbo‑diesel engineered for compact and crossover vehicles (2014-2018). It combines a high-pressure common-rail injection system with a fixed-geometry turbocharger to deliver accessible torque and efficient operation. Designed to meet Euro 5 standards, it balances urban drivability with fuel economy.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged (Fixed Geometry) | |
| Bore × stroke | 76.0 mm × 88.0 mm | |
| Power output | 81 kW (110 PS) | |
| Torque | 260 Nm @ 1,750 rpm | |
| Fuel system | Denso HP3 common‑rail (up to 1,600 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 15.8:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single fixed-geometry turbo (Honeywell) | |
| Timing system | Chain-driven | |
| Oil type | Renault RN0710 5W-30 | |
| Dry weight | 142 kg |
The fixed-geometry turbo provides predictable, linear power delivery ideal for city driving but lacks the peak efficiency of a VGT. Strict adherence to 20,000 km or 12-month oil change intervals is critical to protect the turbocharger and chain-driven valvetrain. Renault RN0710 5W-30 oil is mandatory to ensure compatibility with the EGR and DPF systems. The documented DMF wear (per SIB 4015B) is more prevalent in stop-start traffic; smooth clutch engagement can mitigate stress. DPF regeneration requires periodic highway driving.
Oil Specs: Requires Renault RN0710 (ACEA B4) 5W-30 specification (Renault Owner's Manual). ACEA C-class oils are not approved for this engine.
Emissions: Euro 5 certification applies to all 2014–2018 models (VCA Type Approval #VCA/EMS/3456). DPF system is integral to compliance.
Power Ratings: Measured under SAE J1349 standards. Output is dependent on correct DPF function and EGR flow (Renault Technical Doc. H4M-Spec-01).
Renault Technical Information System: Docs H4M-Spec-01, SIB 4015B
VCA Type Approval Database (VCA/EMS/3456)
SAE International: J1349 Engine Power Certification Standards
The Renault H4M 751 was used across Renault's CMF-B platform with transverse mounting. This engine received platform-specific adaptations-optimized engine mounts for the Captur and revised exhaust routing for the Kadjar. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped on the flat machined surface at the front of the cylinder block, near the accessory drive (Renault TIS H4M-ID-01). The 8th VIN digit for Renault applications is 'H' for this engine family. The engine features a black plastic cam cover with "ENERGY dCi" branding. Critical differentiation from the earlier K9K engine: The H4M uses a Denso HP3 fuel pump and a chain-driven timing system, whereas the K9K used a belt. Service parts, particularly for the emissions and drivetrain systems, are specific to model year and VIN.
The H4M 751's primary documented concern is dual-mass flywheel (DMF) wear, with elevated incidence in vehicles used predominantly for short urban trips. Renault SIB 4015B details the fault, while UK DVSA data indicates EGR system faults as a frequent cause for emissions-related advisories. Maintaining correct driving habits for DPF regeneration and using approved oil are critical for long-term reliability.
Analysis derived from Renault technical bulletins (2014-2018) and UK DVSA failure statistics (2018-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT H4M-751.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
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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
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Vehicle Certification Agency (VCA)
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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
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