The Renault K4M 748 is a 1,598 cc, inline‑four petrol engine produced between 2008 and 2015. It features a dual overhead camshaft (DOHC) design with 16 valves and multi‑point fuel injection, delivering outputs typically around 80 kW (109 PS) and 148 Nm of torque. Its simple, non‑turbocharged architecture prioritises reliability and cost‑effective ownership.
Fitted to models such as the Clio III, Mégane III, and Scénic III, the K4M 748 was engineered for dependable dail…
Production years 2008–2010 meet Euro 4 standards; 2011–2015 models may have Euro 5 compliance depending on market .
The Renault K4M 748 is a 1,598 cc inline‑four naturally aspirated petrol engine engineered for compact and family hatchbacks (2008-2015). It combines multi‑point fuel injection with a DOHC 16‑valve head to deliver smooth, linear power and predictable drivability. Designed to meet Euro 4 (and some market‑specific Euro 5) standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally Aspirated | |
Bore × stroke | 79.5 mm × 80.5 mm | |
Power output | 80 kW (109 PS) | |
Torque | 148 Nm @ 3,750 rpm | |
Fuel system | Multi‑point fuel injection (Siemens) | |
Emissions standard | Euro 4 (pre‑2011); Euro 5 depending on market | |
Compression ratio | 9.8:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt‑driven (requires periodic replacement) | |
Oil type | Renault RN0700 (SAE 5W‑40) | |
Dry weight | 112 kg |
The Renault K4M 748 was used across Renault's B/C platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Scénic and revised exhaust manifolds in facelifted Mégane models-and from 2012 the Clio IV adopted a different engine family, creating interchange limits. All adaptations are documented in OEM technical bulletins.
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The K4M 748's primary reliability risk is exhaust camshaft lobe wear, with elevated incidence in vehicles subjected to frequent short trips. Renault internal data indicated a notable number of cases before 80,000 km, while owner reports frequently cite timing belt failure as a major concern if neglected. Infrequent oil changes and use of incorrect oil viscosity make adherence to the RN0700 specification critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
The most common questions about engine codes, what they mean, how to find them and how this database works
The K4M 748 is generally robust with a simple design, but long-term reliability hinges on strict maintenance. The critical items are timely timing belt changes (every 120,000 km/5 years) and using the correct RN0700 (5W-40) oil to prevent camshaft wear. With proper care, these engines can easily exceed 200,000 km.
The most frequent issues are exhaust camshaft lobe wear (causing rough running), timing belt failure if neglected, coolant leaks from plastic housings, and ignition coil pack failures. These are well-documented in Renault service bulletins and owner reports.
This 1.6L petrol engine was primarily used in the Renault Clio III (2008-2012), Mégane III (2008-2015), and Scénic III (2009-2015), typically badged as '1.6 16V'. It was not used in Dacia or Nissan models of that era.
Yes, but gains are modest. ECU remaps can yield around +5-10 kW by optimizing fuel and ignition timing. Significant power increases require forced induction (turbo/supercharger), which is complex and costly. Most tuning focuses on improving throttle response rather than peak power.
Real-world fuel economy is respectable. Expect around 7.5-8.5 L/100km (33-38 mpg UK) in mixed driving for a Mégane or Scénic. Smaller, lighter Clios may achieve 6.5-7.5 L/100km (38-43 mpg UK). Consumption is higher in city traffic and with aggressive driving.
Yes. The K4M 748 is an interference engine. If the timing belt breaks or jumps, the pistons will collide with the open valves, causing severe internal damage that requires a costly engine rebuild or replacement.
Renault mandates RN0700 specification oil, typically SAE 5W-40. Using this specific oil is crucial for protecting the camshafts from premature wear. Always use a high-quality, fully synthetic oil that meets this standard and change it every 15,000 km or 12 months.
Comprehensive technical documentation and regulatory references
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Regulatory Stability
EU regulations are referenced using CELEX identifiers for long-term stability.
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
Official guidance on engine swaps and inspection implications.
Vehicle Certification Agency (VCA)
UK type-approval authority for automotive products.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
Type-approval guidance and documentation.
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