The Dacia K7M 702 is a 1,598 cc, inline — four petrol engine produced between 1998 and 2013. It was developed by Renault for use across its entry — level vehicle lineup and adopted by Dacia after the brand's acquisition. This SOHC, 8 — valve unit features multi — point fuel injection (MPi) and was designed for durability and low running costs. It produces 59 kW (80 PS) at 5,500 rpm and 128 Nm of torque at 3,000 rpm, offering adequate performance for urban and regional driving.
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Production years 1998–2005 meet Euro 3 standards; 2006–2013 models comply with Euro 4 .
The Dacia K7M 702 is a 1,598 cc inline-four petrol engine engineered for budget-oriented vehicles (1998–2013). It combines multi-point fuel injection with a single overhead camshaft to deliver reliable, economical performance. Designed to meet Euro 3 and later Euro 4 emissions standards, it balances durability with cost-effective ownership.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol (Unleaded RON 95) | |
Configuration | Inline-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 78.0 mm × 83.6 mm | |
Power output | 59 kW (80 PS) @ 5,500 rpm | |
Torque | 128 Nm @ 3,000 rpm | |
Fuel system | Multi-point fuel injection (MPi) | |
Emissions standard | Euro 3 (pre-2006); Euro 4 (2006–2013) | |
Compression ratio | 9.8:1 | |
Cooling system | Water-cooled | |
Turbocharger | Not applicable | |
Timing system | Timing belt (renew every 120,000 km) | |
Oil type | Refer to vehicle handbook / manufacturer specification | |
Dry weight | 112 kg |
The Dacia K7M 702 was used across Dacia's Logan/Sandero platforms with transverse mounting and shared architecture with Renault and Nissan global models. This engine received platform-specific adaptations-shortened intake manifolds in the Logan and revised exhaust manifolds in the Symbol-and from 2006 the facelifted Logan Phase II adopted revised engine management software, creating interchange limits. Partnerships allowed Renault's Clio II and Nissan's Almera to use identical K7M units. All adaptations are documented in OEM technical bulletins.
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The K7M 702's primary reliability risk is cylinder head warping on high-mileage or poorly maintained units, with elevated incidence in hot climates and stop-start urban use. Renault internal quality reports from 2010 indicated a measurable failure rate in pre-2006 engines exceeding 100,000 km, while VCA MOT data shows cooling system neglect as a top cause of engine-related failures in Dacia models. Infrequent coolant changes and extended timing belt intervals increase thermal and mechanical stress, making adherence to service schedules critical.
Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.
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The K7M 702 is generally robust when maintained properly, but pre-2006 models are prone to head warping if overheated or neglected. Timing belt integrity is critical due to interference design. Engines with regular oil and coolant changes, and timely belt replacement, often exceed 200,000 km. Post-2006 revisions improved cooling system reliability, enhancing longevity in well-serviced vehicles.
Key issues include cylinder head warping from overheating, timing belt failure due to overdue replacement, idle instability from carbon buildup, and coolant leaks from plastic housings. These are documented in Renault service bulletins, particularly SIB 036/2009 for head and cooling concerns. Preventive maintenance significantly reduces failure risk.
The K7M 702 was used in the Dacia Logan (2005–2013), Sandero (2008–2012), and Symbol (2002–2013). It was also shared with Renault Clio II (1998–2005) and Nissan Almera (2000–2006). All models feature the 1.6L 8V MPI configuration, with Euro 3 or Euro 4 compliance depending on model year.
Limited tuning potential exists. ECU remaps offer minimal gains due to restrictive intake and exhaust design. Aftermarket headers or throttle bodies may yield slight improvements, but the SOHC 8-valve architecture limits high-RPM power. Most owners prioritize reliability over performance; significant modifications are uncommon and not OEM-supported.
In a Dacia Logan, the K7M 702 averages 6.5–7.5 L/100km (38–35 mpg UK) in mixed driving. Highway efficiency improves to ~5.8 L/100km (~49 mpg UK). Real-world consumption depends on load and terrain, but the engine’s simplicity and light tuning contribute to dependable fuel economy, especially in urban settings.
Yes. The K7M 702 is an interference engine. If the timing belt fails, pistons contact open valves, causing severe internal damage. This makes adherence to the 120,000 km replacement interval essential. Any signs of belt wear or engine misalignment should prompt immediate inspection to avoid costly repairs.
Renault specifies SAE 10W-40 oil meeting ACEA A3/B3 standards. Mineral or semi-synthetic oils are acceptable due to moderate operating pressures. Change intervals are 15,000 km or annually. Proper oil selection ensures valve train protection and reduces sludge buildup, especially in hot climates.
Comprehensive technical documentation and regulatory references
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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.
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Type-approval guidance and documentation.
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