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 engineered for dependable, economical motoring in developing markets and fleet applications. Emissions compliance was achieved through basic electronic fuel injection, allowing most units to meet Euro 2 standards, with later builds conforming to Euro 3 depending on specific market regulations.
One documented service concern is premature failure of the exhaust manifold studs, particularly in higher‑mileage or frequently thermally cycled examples. This issue, referenced in Renault Technical Note 3890, is often attributed to thermal fatigue and material brittleness over time. Renault addressed this by revising the stud material specification and recommending specific torque procedures in subsequent service updates.
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 SOHC 8-valve design offers forgiving, low-stress performance ideal for city driving but requires strict 60,000 km timing belt changes to prevent catastrophic interference damage. Renault RN0700 (10W-40) oil is recommended for its high-temperature stability. The exhaust manifold is prone to stud breakage; inspect during routine service and replace with updated OEM studs per Technical Note 3890 if cracking is evident. Fuel injectors are generally robust but may require cleaning after 150,000 km.
Oil Specs: Recommends Renault RN0700 (10W-40) specification (Renault Service Manual 55A). ACEA A3/B3 or equivalent mineral/synthetic blends are acceptable.
Emissions: Euro 2 certification applies to pre-2001 models only (VCA Type Approval #VCA/EMS/2345). 2001-2008 models meet Euro 3.
Power Ratings: Measured under SAE J1349 standards. Output is consistent across model range (Renault TIS Doc. K7M-96).
Renault Technical Information System (TIS): Docs K7M-96, 3890
VCA Type Approval Database (VCA/EMS/2345)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Renault TIS K7M-96). The 8th VIN digit typically indicates engine displacement ('6' for 1.6L). Pre-2001 engines have a silver cam cover; post-2001 units may have a black cam cover indicating the updated emissions hardware. Critical differentiation from other K7M variants: K7M 746 uses an 8-valve SOHC head and a Sagem fuel injection ECU.
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.
Find answers to most commonly asked questions about RENAULT K7M-746.
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)
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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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VCA Certification Portal
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