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 responsive performance. Emissions compliance was achieved through exhaust gas recirculation (EGR) and a diesel particulate filter (DPF), meeting Euro 4 standards for most units, with later builds achieving Euro 5 in specific markets.
A documented concern involves potential EGR cooler internal leaks, which can introduce coolant into the combustion chamber or exhaust stream. This issue, referenced in Renault Technical Note MEG‑07‑03, is often caused by thermal fatigue in the cooler matrix. Renault introduced revised cooler units for vehicles produced after mid‑2009.
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 VGT turbo provides accessible torque for daily driving but demands adherence to 20,000 km service intervals to prevent EGR/DPF issues. Renault RN0710 (5W-30) oil is essential for maintaining turbo and injector health. Coolant quality must be monitored, as EGR cooler failures can lead to hydrolock. Vehicles built before Q3 2009 should have the EGR cooler inspected proactively per Renault Technical Note MEG-07-03. Using ultra-low-sulfur diesel (EN 590) is mandatory to protect the high-pressure fuel system.
Oil Specs: Requires Renault RN0710 (5W-30) specification (Renault Owner's Manual). Compatible with ACEA C3 standards.
Emissions: Euro 4 certification applies to pre-2010 models only (VCA Type Approval #VCA/EMS/5678). Some 2010-2011 models meet Euro 5 depending on market.
Power Ratings: Measured under SAE J1349 standards. 110 kW output requires EU3+ fuel quality (Renault TIS Doc. F9Q-005).
Renault Technical Information System (TIS): Docs F9Q-001, F9Q-002, F9Q-005, SIB MEG-07-03
VCA Type Approval Database (VCA/EMS/5678)
SAE International: J1349 Engine Power Certification Standards
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.
Locate the engine code stamped on the front face of the cylinder block, near the gearbox flange (Renault TIS F9Q-004). The 8th VIN digit typically corresponds to engine displacement ('8' for 1.9L dCi). Pre-2010 engines have a silver EGR cooler housing; post-2010 units may have a black housing indicating the revised part. Critical differentiation from F9Q 732: F9Q 734 has a Garrett VGT turbo with a specific actuator arm shape. Service parts for the EGR system require checking the build date against Technical Note MEG-07-03 for compatibility.
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.
Find answers to most commonly asked questions about RENAULT F9Q-734.
Comprehensive technical documentation and regulatory references
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EU emissions and type-approval regulations (e.g., CELEX:32007R0715, CELEX:32017R1151).
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DVLA: Engine Changes & MoT
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Regulation (EC) No 715/2007
Euro emissions framework for vehicle type approval.
Commission Regulation (EU) 2017/1151
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