The Renault K7M 746 is a 1,598 cc, inline‑four petrol engine produced between 1996 and 2008. It features a single overhead camshaft (SOHC) design with 8 valves and multi‑point fuel injection, delivering outputs around 55 kW (75 PS) and 128 Nm of torque. Its simple, robust architecture prioritises reliability and ease of maintenance for cost — conscious urban and regional driving.
Fitted to entry — level models like the Clio II, Kangoo I, and Symbol, the K7M 746 was engineere…
Production years 1996–2000 meet Euro 2 standards; 2001–2008 models meet Euro 3 compliance depending on market (VCA UK Type Approval #VCA/EMS/2345).
The Renault K7M 746 is a 1,598 cc inline‑four naturally aspirated petrol engine engineered for compact and light commercial vehicles (1996-2008). It combines multi‑point fuel injection with a simple SOHC 8-valve layout to deliver predictable performance and low running costs. Designed to meet Euro 2 (and later Euro 3) standards, it prioritises mechanical simplicity and serviceability for high-mileage use.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, SOHC, 8‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 79.5 mm × 80.5 mm | |
Power output | 55 kW (75 PS) @ 5,250 rpm | |
Torque | 128 Nm @ 2,800 rpm | |
Fuel system | Multi‑point fuel injection (Sagem) | |
Emissions standard | Euro 2 (pre‑2001); Euro 3 (2001–2008) | |
Compression ratio | 9.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Belt‑driven (front‑mounted) | |
Oil type | Renault RN0700 (SAE 10W‑40) | |
Dry weight | 105 kg |
The Renault K7M 746 was used across Renault's B and light commercial platforms with transverse mounting. This engine received platform-specific adaptations-reinforced mounts in the Kangoo and simplified intake systems in the Symbol-and from 2001 the adoption of emissions hardware for Euro 3 compliance, creating minor service part differences. All adaptations are documented in OEM technical bulletins.
The K7M 746's primary documented concern is exhaust manifold stud failure, with elevated incidence in high-mileage or frequently thermally cycled vehicles. Renault internal reports noted this issue across the production run, while owner feedback often cites distributor cap/rotor wear as a common electrical fault. Neglecting the 60,000 km timing belt interval is the single greatest risk, leading to total engine destruction.
Analysis derived from Renault technical bulletins (1996-2008) and UK DVSA failure statistics (2008-2023). 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
Yes, the K7M 746 is renowned for its mechanical simplicity and durability. Its 8-valve SOHC design is inherently robust. The main risks are timing belt neglect (catastrophic) and exhaust manifold stud failure (common but repairable). With strict adherence to the 60,000 km belt change and using quality parts, it can easily exceed 300,000 km.
The most frequent issues are exhaust manifold studs breaking, distributor cap/rotor wear causing misfires, and oil leaks from the valve cover gasket. The single most critical issue is timing belt failure due to missed service intervals, which destroys the engine. These are well-documented in Renault service bulletins.
This 1.6L 8-valve petrol engine was used in Renault's entry-level lineup from 1996-2008. Key models include the Clio II (1998-2005), Kangoo I (1997-2008), Symbol (1999-2008), and the Dacia Solenza (2003-2005). It powered base trim levels like the RN and RL across these vehicles.
Significant power gains are impractical. The 8-valve SOHC head and basic fuel injection limit potential. Minor improvements (5-8 kW) are possible with a free-flow exhaust and induction kit, but the engine is best left in its stock, ultra-reliable configuration. Forced induction is not a viable option.
Fuel economy is modest. Expect around 8.0-9.5 L/100km (30-35 mpg UK) in mixed driving for a Clio or Symbol. The heavier Kangoo may achieve 9.0-10.5 L/100km (27-31 mpg UK). Figures are heavily dependent on driving style and vehicle condition, with older, poorly maintained examples consuming more.
Yes. The K7M 746 is an interference engine. If the timing belt fails or jumps, the pistons will collide with the open valves, causing severe internal damage requiring a full engine rebuild or replacement. This makes the 60,000 km belt change interval absolutely non-negotiable.
Renault recommends a 10W-40 mineral or semi-synthetic oil meeting the RN0700 standard. While less critical than modern engines, using a quality ACEA A3/B3 oil ensures good protection. Change intervals should not exceed 15,000 km or 12 months. The simpler design is more forgiving of oil type than its 16-valve successors.
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
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
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