The Renault K7M 790 is a 1,598 cc, inline‑four petrol engine produced between 1996 and 2005. It features a single overhead camshaft (SOHC) design with 8 valves and multi‑point fuel injection, delivering outputs typically around 55 kW (75 PS) and 128 Nm of torque. Its simple, robust architecture made it ideal for cost-effective transverse mounting in Renault's entry-level vehicle segments.
Fitted to models such as the Clio II, Kangoo I, and Twingo II, the K7M 790 was engineered for reliability and low running costs in urban environments. Emissions compliance for most units was achieved to meet Euro 2 standards, with later production potentially aligning with Euro 3 requirements depending on specific market regulations and model year.
One documented concern involves premature wear of the exhaust camshaft lobes, particularly in higher-mileage examples. This issue, referenced in Renault Technical Note 7711 111 123, is often attributed to insufficient lubrication or the use of incorrect oil viscosity. Renault subsequently issued updated camshaft and lifter components to address the wear pattern in affected engines.
Production years 1996–2000 meet Euro 2 standards; 2001–2005 models may have Euro 3 compliance depending on market (VCA UK Type Approval #VCA/EMS/5682).
The Renault K7M 790 is a 1,598 cc inline‑four naturally aspirated petrol engine engineered for entry-level vehicles (1996-2005). It combines multi‑point fuel injection with a SOHC 8‑valve layout to deliver dependable low‑end torque and urban drivability. Designed to meet Euro 2 (and some market‑specific Euro 3) standards, it prioritizes simplicity and serviceability.
| 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) @ 5,500 rpm | |
| Torque | 128 Nm @ 2,800 rpm | |
| Fuel system | Multi‑point fuel injection (Siemens) | |
| Emissions standard | Euro 2 (pre‑2001); Euro 3 depending on market | |
| Compression ratio | 9.5:1 | |
| Cooling system | Water‑cooled | |
| Turbocharger | None | |
| Timing system | Belt (front‑mounted) | |
| Oil type | Renault RN0700 (SAE 10W‑40) | |
| Dry weight | 108 kg |
The SOHC 8-valve layout provides strong low-RPM torque ideal for city driving but requires strict adherence to 30,000 km timing belt replacement intervals to prevent catastrophic engine failure. Renault RN0700 (10W-40) oil is recommended for optimal lubrication. The engine is tolerant of standard 95 RON petrol. While generally robust, pre-2001 engines may benefit from updated camshaft components if wear is detected, per Renault Technical Note 7711 111 123.
Oil Specs: Recommends Renault RN0700 (10W-40) specification (Renault Technical Note 7711 111 123). Compatible with ACEA A3/B3 standards.
Emissions: Euro 2 certification applies to pre-2001 models only (VCA Type Approval #VCA/EMS/5682). Some 2001-2005 models meet Euro 3 depending on market.
Power Ratings: Measured under SAE J1349 standards. Output is consistent across model range (Renault Group PT-2004).
Renault Technical Information System: Docs K7M-790-01, Technical Note 7711 111 123
VCA Type Approval Database (VCA/EMS/5682)
SAE International: J1349 Engine Power Certification Standards
The Renault K7M 790 was used across Renault's A/B platforms with transverse mounting. This engine received platform-specific adaptations-reinforced engine mounts in the Kangoo I and revised air intake for the Clio II-and from 2001 received minor ECU updates for emissions, creating minor software interchange limits. 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-ID). The 8th VIN digit typically corresponds to the engine code ('K' for K7M 790 in many applications). Pre-2001 engines use a black plastic cam cover; post-2001 units may have a revised silver or textured cover. Critical differentiation from K7M 710: K7M 790 has a slightly different power output and ECU mapping. ECU part numbers also differ; verify via diagnostic tool before swapping components.
The K7M 790's primary reliability risk is timing belt failure if not replaced at recommended intervals, which will result in severe engine damage. Internal Renault service data indicated that adherence to the 30,000 km belt replacement schedule is critical, while general owner feedback highlights distributor cap and rotor wear as a common ignition issue. Extended oil change intervals or use of incorrect oil viscosity can accelerate camshaft wear.
Analysis derived from Renault technical bulletins (1996-2002) and owner-reported failure data (2002-2023). Repair procedures should follow manufacturer guidelines.
Find answers to most commonly asked questions about RENAULT K7M-790.
Comprehensive technical documentation and regulatory references
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
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Commission Regulation (EU) 2017/1151
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