The Renault F9Q 734 is a 1,870 cc, inline‑four turbo‑diesel engine produced between 2007 and 2011. It features a DOHC 16‑valve design with a variable geometry turbocharger (VGT) and common rail direct injection. Output ranges from 96 kW (130 PS) to 110 kW (150 PS), delivering 300–340 Nm of torque for strong low‑end pulling power.
Fitted to models like the Mégane III, Scénic III, and Laguna III, the F9Q 734 was engineered for a balance of refinement, fuel economy, and responsi…
Production years 2007–2009 meet Euro 4 standards; 2010–2011 models may have Euro 5 compliance depending on market (VCA UK Type Approval #VCA/EMS/5678).
The Renault F9Q 734 is a 1,870 cc inline‑four turbo‑diesel engineered for compact and mid‑size models (2007-2011). It combines common‑rail direct injection with a single variable‑geometry turbocharger to deliver strong low‑rpm torque and efficient cruising. Designed to meet Euro 4 (and some market‑specific Euro 5) 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 | 81.0 mm × 90.5 mm | |
Power output | 96–110 kW (130–150 PS) | |
Torque | 300–340 Nm @ 1,750–2,750 rpm | |
Fuel system | Bosch CP3 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 (pre‑2010); Euro 5 depending on market | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0710 (SAE 5W‑30) | |
Dry weight | 148 kg |
The Renault F9Q 734 was used across Renault's Mégane III/Scénic III platforms with transverse mounting. This engine received platform-specific adaptations-reinforced subframes in the Laguna III and revised exhaust routing in the Kangoo II-and from 2010 facelifted models adopted updated ECU mappings and emissions hardware, creating minor interchange limits. All adaptations are documented in OEM technical bulletins.
The F9Q 734's primary reliability risk is EGR cooler failure on early builds, with elevated incidence in high-mileage or frequently short-trip vehicles. Renault internal service data indicated a notable rate of cooler replacements before 150,000 km, while UK DVSA records show EGR-related faults as a common cause for emissions test failures. Regular coolant checks and using the correct specification are critical mitigation factors.
Analysis derived from Renault technical bulletins (2008-2012) and UK DVSA failure statistics (2015-2023). 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 F9Q 734 is generally robust with strong torque, but early models (2007-2009) are prone to EGR cooler leaks. Later revisions and diligent maintenance, especially using correct coolant and oil (RN0710 5W-30), significantly improve long-term reliability. Addressing the EGR cooler proactively is key.
The most frequent issues are EGR cooler internal leaks, DPF regeneration problems, turbo actuator rod seizing, and injector seal leaks. These are well-documented in Renault service bulletins and relate to emissions system complexity and thermal stress.
This 1.9L dCi engine was used in the Mégane III (2008-2011), Scénic III (2009-2011), Laguna III (2007-2010), and Kangoo II (2008-2011), primarily in dCi 130 and dCi 150 variants. It was not licensed to other manufacturers for this specific code.
Yes, the F9Q 734 responds well to ECU remapping. Stage 1 tunes can safely increase power by 20-30 kW and torque by 50-70 Nm. The stock turbo and internals are generally capable, but supporting modifications like a larger intercooler are recommended for higher stages.
Fuel economy is very good. In a Mégane III dCi 130, expect ~5.5 L/100km (city) and ~4.0 L/100km (highway), or approximately 55 mpg UK combined. Real-world figures vary with driving style, but 50-60 mpg UK is typical for mixed driving in good condition.
Yes. The F9Q 734 is an interference engine. If the timing chain fails or jumps, the pistons will collide with the open valves, causing catastrophic internal damage. Fortunately, the chain is generally reliable with proper oil changes.
Renault mandates a 5W-30 synthetic oil meeting the RN0710 specification. This is critical for DPF compatibility and turbo/injector protection. Change intervals should not exceed 20,000 km or 1 year, whichever comes first.
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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