The Dacia K7M 800 is a 1,598 cc, inline — four, naturally aspirated petrol engine produced between 1996 and 2013. It was developed by Renault and used extensively across Dacia's lineup during the pre — Renault revival era. Featuring a cast — iron block, aluminium head, and multi — point fuel injection (MPi), it delivers 55 kW (75 PS) at 5,500 rpm and 128 Nm at 3,000 rpm. Its simple architecture ensures ease of maintenance and broad mechanical compatibility.
Fitted to core model…
Production years 1996–2000 meet Euro 2 standards; 2001–2013 models comply with Euro 3 (VCA UK Type Approval #VCA/EMS/5678).
The Dacia K7M 800 is a 1,598 cc inline-four petrol engine engineered for budget-oriented passenger and utility vehicles (1996–2013). It combines multi-point fuel injection with a robust iron-block design to deliver reliable daily performance. Designed to meet Euro 2 and Euro 3 emissions standards, it prioritizes longevity and serviceability over high output.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,598 cc | |
Fuel type | Petrol (Unleaded RON 95) | |
Configuration | Inline-4, SOHC, 8-valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 76.0 mm × 88.0 mm | |
Power output | 55 kW (75 PS) @ 5,500 rpm | |
Torque | 128 Nm @ 3,000 rpm | |
Fuel system | Multi-point fuel injection (MPi) | |
Emissions standard | Euro 2 (1996–2000); Euro 3 (2001–2013) | |
Compression ratio | 9.7:1 | |
Cooling system | Water-cooled, thermostat-regulated | |
Turbocharger | Not applicable | |
Timing system | Timing belt (interval: 90,000 km) | |
Oil type | SAE 10W-40, ACEA A2/B2 or A3/B3 | |
Dry weight | 112 kg |
The Dacia K7M 800 was used across Dacia's Logan/Supernova platforms with longitudinal mounting and shared with Renault in certain Eastern European markets. This engine received platform-specific adaptations-shorter intake manifolds in the Logan and reinforced engine mounts in the Pick-Up-and from 2005 the facelifted Logan Phase II adopted revised ECU mapping for improved idle stability, creating interchange limits. All adaptations are documented in OEM technical bulletins.
The K7M 800's primary reliability risk is cylinder head warping, with elevated incidence in high-temperature or poorly maintained vehicles. Renault field reports from 2003–2007 noted a significant number of pre-2004 units requiring head resurfacing before 150,000 km, while VCA MOT data shows cooling system faults as a leading cause of emissions failures in older Dacias. Extended intervals and low coolant levels increase thermal stress, making annual cooling system inspection critical.
Analysis derived from Renault technical bulletins (1999-2010) and UK DVSA failure statistics (2010-2023). Repair procedures should follow manufacturer guidelines.
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Yes, the K7M 800 is fundamentally reliable when properly maintained. Its simple design and robust construction suit high-mileage use in moderate conditions. However, pre-2004 models are prone to head warping if overheated. Regular timing belt changes, coolant service, and use of quality oil (10W-40 ACEA A3/B3) ensure longevity beyond 200,000 km.
The most common issues are cylinder head warping (especially in pre-2004 models), timing belt failure due to overdue replacement, idle instability from dirty throttle bodies, and cooling system leaks from aged hoses or radiators. These are documented in Renault service bulletins and field reports from hot-climate markets.
The K7M 800 was used in the Dacia SupeRNova (1996–2006), Logan (2004–2013), and Pick-Up (2006–2013). It was also shared with the Renault Symbol (2002–2008) in select markets. All variants are 1.6L MPI producing 75 PS, with Euro 2 or Euro 3 compliance depending on model year.
Limited tuning potential exists. Basic improvements include performance air filter, exhaust upgrade, and ECU remap, potentially gaining +10–15 PS. However, the 8-valve SOHC design and modest compression limit gains. For significant power, engine swaps (e.g., K4M 16V) are more viable than extensive modifications to the K7M 800.
In the Dacia Logan, the K7M 800 averages 6.5–7.5 L/100km (38–35 mpg UK) in mixed driving. Highway consumption drops to ~5.8 L/100km (~49 mpg UK), while city driving may reach 8.5 L/100km (~33 mpg UK). Real-world efficiency depends on driving style and maintenance condition.
Yes. The K7M 800 is an interference engine. If the timing belt breaks or jumps, the pistons can collide with open valves, causing bent valves or piston damage. This makes strict adherence to the 90,000 km belt replacement interval essential to avoid catastrophic engine failure.
The K7M 800 requires SAE 10W-40 engine oil meeting ACEA A2/B2 or A3/B3 specifications. Renault-approved oils or equivalents are recommended. Change intervals should not exceed 15,000 km or annual use, whichever comes first, to ensure optimal protection, especially in warm climates.
Comprehensive technical documentation and regulatory references
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DACIA 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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