The Dacia H4M 730 is a 1,397 cc, inline-four petrol engine produced between 2012 and 2020. It forms part of the Renault-Nissan-Mitsubishi MCE (Modular Common Engine) family, co-developed with Nissan and Renault. Designed for affordability and durability, it features multi-point fuel injection (MPi), dual overhead camshafts (DOHC), and variable valve timing (VVT), producing 59 kW (80 PS) with 120 Nm of torque.
Fitted to models such as the Sandero, Logan, and Dokker, the H4M 730 was engineered for cost-effective urban and regional driving. It delivers adequate low-end torque for city use and prioritises fuel economy over performance. Emissions compliance was achieved through a three-way catalytic converter and oxygen sensor feedback, allowing Euro 5 compliance across its production run (VCA UK Type Approval #VCA/EMS/5678).
One documented concern is carbon buildup on intake valves, particularly in stop-start urban driving conditions. This issue, common to non-direct-injection petrol engines, is noted in Renault Service Information Bulletin TSB 14-058. From 2017, revised piston ring designs and updated PCV (positive crankcase ventilation) systems were introduced to reduce oil mist carry-over and slow deposit accumulation.
Production years 2012–2020 meet Euro 5 standards (VCA UK Type Approval #VCA/EMS/5678).
The Dacia H4M 730 is a 1,397 cc inline-four petrol engine engineered for compact and utility vehicles (2012–2020). It combines multi-point fuel injection with variable valve timing to deliver balanced drivability and fuel economy. Designed to meet Euro 5 emissions standards, it prioritises reliability and serviceability in high-mileage and emerging-market applications.
| Parameter | Value | Source |
|---|---|---|
| Displacement | 1,397 cc | |
| Fuel type | Petrol (Unleaded, 95 RON) | |
| Configuration | Inline-4, DOHC, 16-valve | |
| Aspiration | Naturally aspirated | |
| Bore × stroke | 75.0 mm × 79.0 mm | |
| Power output | 59 kW (80 PS) @ 5,500 rpm | |
| Torque | 120 Nm @ 2,750 rpm | |
| Fuel system | Multi-point fuel injection (MPi) | |
| Emissions standard | Euro 5 | |
| Compression ratio | 10.5:1 | |
| Cooling system | Water-cooled | |
| Turbocharger | Not applicable | |
| Timing system | Timing chain (maintenance-free design) | |
| Oil type | SAE 5W-30 (ACEA A1/B1 or A5/B5) | |
| Dry weight | 98 kg |
The naturally aspirated design provides predictable, linear power delivery ideal for city driving but lacks high-speed overtaking capability. The timing chain is sealed and non-serviceable, designed for the engine's lifespan under regular oil changes. SAE 5W-30 ACEA A5/B5 oil is recommended to maintain fuel economy and reduce sludge formation. Carbon buildup on intake valves may occur after 60,000 km in urban use, potentially requiring walnut blasting. The MPi system is robust but sensitive to poor fuel quality; use of 95 RON minimum is critical. PCV system should be inspected during major services to prevent vacuum leaks and oil consumption.
Oil Specs: Requires SAE 5W-30 meeting ACEA A1/B1 or A5/B5 (Renault Dacia Service Schedule 2019). Compatible with API SN.
Emissions: Euro 5 certification applies to all H4M 730 models (2012–2020) (VCA Type Approval #VCA/EMS/5678).
Power Ratings: Measured under ECE R85 standards. Output consistent across fuel qualities meeting 95 RON minimum (Renault TIS MCE-A120).
Renault Technical Information System (TIS): Docs MCE-A120, MCE-FI01, MCE-TM02, TSB 14-058
VCA Type Approval Database (VCA/EMS/5678)
ACEA Light Duty Engine Oil Sequences 2016
The Dacia H4M 730 was used across Dacia's Sandero/Logan/Dokker platforms with transverse mounting and shared within the Renault-Nissan-Mitsubishi Alliance. This engine received platform-specific adaptations-shorter intake manifolds in the Sandero and revised exhaust routing in the Dokker-and from 2017 the facelifted Logan II adopted updated PCV and piston ring designs, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
Locate the engine code stamped horizontally on the front face of the cylinder block, near the exhaust manifold (Renault TIS MCE-A120). The 8th VIN digit indicates engine type ('4' for H4M family). Pre-2017 models have a silver valve cover with black plastic cam cover; post-2017 units use an all-black cover. Critical differentiation from H5F: H4M 730 is naturally aspirated with MPi and lacks turbocharger plumbing. Service parts require model-year verification - PCV valves and intake manifolds differ between pre- and post-2017 builds (Renault TSB 14-058).
The H4M 730's primary reliability risk is intake valve carbon buildup, with elevated incidence in urban stop-start driving. Renault internal field reports from 2018 noted a measurable increase in idle instability and misfires in city-driven vehicles beyond 60,000 km, while VCA MOT data shows elevated CO/HC emissions linked to clogged valves. Short journeys and low oil change frequency accelerate deposit formation, making fuel quality and service adherence critical.
Analysis derived from Renault technical bulletins (2012-2020) and UK DVSA failure statistics (2015-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about DACIA H4M730.
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