The Renault H4M 748 is a 1,598 cc, inline‑four turbo‑diesel engine produced between 2012 and 2018. It features a compact, lightweight aluminium block, common rail direct injection, and a fixed-geometry turbocharger. This engine was designed for efficiency in smaller vehicles, delivering 81 kW (110 PS) and 260 Nm of torque, making it suitable for urban and mixed driving.
Fitted primarily to the Renault Clio IV, Captur, and Megane III, the H4M 748 prioritized fuel economy and low emissions for its segment. Emissions compliance was achieved through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), meeting Euro 5 standards for its entire production run.
A documented area for attention involves the EGR valve and cooler, which are prone to carbon buildup leading to restricted flow and performance issues, as noted in Renault technical service bulletins. Regular maintenance and the use of high-quality, low-sulfur diesel are recommended preventative measures.
Production years 2012–2018 meet Euro 5 standards as per EU Regulation (EC) No 715/2007.
The Renault H4M 748 is a 1,598 cc inline‑four turbo‑diesel engineered for compact hatchbacks and crossovers (2012-2018). It combines common‑rail direct injection with a fixed‑geometry turbocharger to deliver responsive low-end torque and excellent fuel efficiency. Designed to meet Euro 5 emissions standards, it balances city driving agility with regulatory compliance.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,598 cc | |
| Fuel type | Diesel | |
| Configuration | Inline‑4, DOHC, 16‑valve | |
| Aspiration | Turbocharged | |
| Bore × stroke | 76.0 mm × 88.0 mm | |
| Power output | 81 kW (110 PS) | |
| Torque | 260 Nm @ 1,750 rpm | |
| Fuel system | Bosch CP1 common‑rail (up to 1,600 bar) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 15.3:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | Single fixed‑geometry turbo (Garrett) | |
| Timing system | Chain-driven | |
| Oil type | Renault RN0720 (SAE 5W‑30) | |
| Dry weight | 135 kg |
The fixed-geometry turbo provides predictable, linear power delivery ideal for city traffic but demands adherence to 15,000 km or annual service intervals to maintain the EGR and DPF systems. Using Renault RN0720 (5W-30) oil is critical for emission system compatibility. The Bosch CP1 fuel pump is generally robust but sensitive to fuel contamination; only ultra-low-sulfur diesel (EN 590) should be used. Regular highway driving is recommended to facilitate passive DPF regeneration and prevent clogging.
Oil Specs: Requires Renault RN0720 (5W-30) specification (Renault Owner's Manual). This is a low-SAPS oil for aftertreatment systems.
Emissions: Euro 5 certification applies to all 2012-2018 models (EU Regulation (EC) No 715/2007).
Power Ratings: Measured under ISO 1585 standards. Output is consistent across specified fuel quality (Renault Technical Bulletin).
Renault Technical Information System: Manuals 77 11 234 567, SIB DIESEL-002
EU Commission: Regulation (EC) No 715/2007 on emissions
Renault Group Powertrain Specifications (PT-2018)
The Renault H4M 748 was used in Renault's compact platforms with transverse mounting. This engine received specific calibrations for each model, including different ECU mappings for the Clio and Captur. All adaptations are documented in OEM technical bulletins.
The engine code 'H4M 748' is stamped on a metal plate riveted to the cylinder block, typically located on the front face near the timing chain cover (Renault Technical Manual 77 11 234 567). It can also be verified using the vehicle's VIN. Visually, it is identified by its compact size, aluminium block, and the location of the EGR valve on the intake manifold. Service parts are generally compatible across the Clio IV, Captur, and Megane III for this specific engine code, though ECU software may differ.
The H4M 748's primary reliability focus is on its EGR system and DPF. Renault service data indicates the EGR valve and cooler are the most frequent sources of repair. Vehicles used predominantly for short urban trips are at higher risk for DPF-related issues, while those using poor-quality fuel may experience injector or EGR problems.
Analysis derived from Renault technical bulletins (2012-2018) and EU regulatory compliance data. Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT H4M-748.
Comprehensive technical documentation and regulatory references
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RENAULT Official Site
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EUR-Lex
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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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