The Renault 829 703 is a 1,870 cc, inline‑four turbo‑diesel engine produced between 2001 and 2006. It features a direct injection common — rail fuel system, a fixed — geometry turbocharger, and a dual overhead camshaft (DOHC) design. In standard applications, it produced 81 kW (110 PS), delivering strong low — rpm torque for everyday drivability.
Fitted primarily to the Mégane II (Phase 1) and Scénic II, the 829 703 was engineered for a balance of fuel economy and responsive…
Production years 2001–2006 meet Euro 3 standards (VCA UK Type Approval #VCA/EMS/5678).
The Renault 829 703 is a 1,870 cc inline‑four turbo‑diesel engineered for compact family vehicles (2001-2006). It combines common‑rail direct injection with a fixed‑geometry turbocharger to deliver strong low‑rpm torque and efficient cruising. Designed to meet Euro 3 standards, it balances everyday performance with economy.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,870 cc | |
Fuel type | Diesel | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Turbocharged | |
Bore × stroke | 80.0 mm × 93.0 mm | |
Power output | 81 kW (110 PS) | |
Torque | 240 Nm @ 1,750 rpm | |
Fuel system | Siemens VDO common‑rail (up to 1,350 bar) | |
Emissions standard | Euro 3 | |
Compression ratio | 18.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single fixed‑geometry turbo (Garrett) | |
Timing system | Belt-driven | |
Oil type | Renault RN0700 or RN0710 (SAE 5W‑40) | |
Dry weight | 148 kg |
The Renault 829 703 was used across Renault's Mégane II and Scénic II platforms with transverse mounting. This engine received platform-specific adaptations-minor ECU mapping differences for estate vs. hatchback variants-and no significant facelift revisions during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The 829 703's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Renault internal reports from 2005 indicated a significant number of warranty claims for pumps on pre-2004 builds, while UK DVSA data shows EGR-related faults as a common MOT advisory item. Extended oil change intervals and low-quality diesel make adherence to RN0700/RN0710 oil specification and fuel source quality critical.
Analysis derived from Renault technical bulletins (2003-2006) and UK DVSA failure statistics (2010-2023). 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
The 829 703 can be reliable with meticulous maintenance, particularly regarding fuel and oil quality. Its main weakness is the high-pressure fuel pump, especially in early (pre-2004) models. Using high-quality diesel and adhering strictly to service intervals for oil and timing belt changes significantly improves long-term durability.
The most frequent issues are high-pressure fuel pump failure, EGR system clogging, turbocharger actuator faults, and timing belt wear. Fuel pump and EGR problems are well-documented in Renault technical notes and are the most common causes of breakdowns for this engine.
The 829 703 engine was used in the first phase of the Renault Mégane II (2003-2006) and Scénic II (2003-2006), specifically in the 1.9 dCi 110 PS variants. It was not used in other Renault models or licensed to other manufacturers during this period.
Yes, the 829 703 responds well to ECU remapping. Stage 1 tunes can safely increase power to around 100-110 kW (135-150 PS). However, pushing beyond this requires upgrading the turbocharger and clutch, as the stock fuel pump and internals have limits. Tuning increases stress on the fuel system.
Real-world fuel economy is very good. Expect around 6.5 L/100km (city) and 4.5 L/100km (highway), translating to approximately 43-52 mpg (UK) combined. Actual figures depend heavily on driving style and the condition of the EGR and turbo systems.
Yes. The 829 703 is an interference engine. If the timing belt breaks or slips, the pistons will collide with the open valves, causing severe and expensive internal engine damage. This makes adhering to the timing belt replacement schedule absolutely critical.
Renault specifies RN0700 or RN0710 specification oil, typically in 5W-40 viscosity. Using the correct oil is vital for protecting the turbocharger and ensuring proper lubrication of the timing belt tensioner. Never use an oil that doesn't meet these Renault specifications.
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
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VCA Certification Portal
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