The Renault F9Q 748 is a 1,870 cc, inline‑four turbo‑diesel engine produced between 2007 and 2011. It features a DOHC valvetrain, common rail direct injection, and a variable geometry turbocharger (VGT), delivering outputs between 96 kW (130 PS) and 110 kW (150 PS) with peak torque of 300–320 Nm. Its robust cast iron block provides durability for high — mileage applications.
Fitted to models such as the Megane III, Scénic III, and Laguna III, the F9Q 748 was engineered for a b…
Production years 2007–2011 meet Euro 4 standards (VCA UK Type Approval #VCA/EMS/5678).
The Renault F9Q 748 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‑ to mid‑rpm torque and efficient highway cruising. Designed to meet Euro 4 standards, it balances performance with fuel 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 | 96–110 kW (130–150 PS) | |
Torque | 300–320 Nm @ 1,750–2,500 rpm | |
Fuel system | Bosch CP3 common‑rail (up to 1,600 bar) | |
Emissions standard | Euro 4 | |
Compression ratio | 16.0:1 | |
Cooling system | Water‑cooled | |
Turbocharger | Single variable‑geometry turbo (Garrett) | |
Timing system | Chain (front‑mounted) | |
Oil type | Renault RN0700/RN0710 (SAE 5W‑30) | |
Dry weight | 165 kg |
The Renault F9Q 748 was used across Renault's Megane III/Scénic III platforms with transverse mounting. This engine received platform-specific adaptations-different intake manifolds and engine mounts for the Laguna III-creating minor service part variations. All adaptations are documented in OEM technical bulletins.
The F9Q 748's primary reliability risk is high-pressure fuel pump failure, with elevated incidence in vehicles using poor-quality fuel. Renault internal reports from 2010 indicated a significant number of warranty claims for pump replacement before 100,000 km, while UK DVSA data shows DPF-related faults as a common MOT advisory item. Extended low-speed driving and infrequent oil changes accelerate EGR and DPF clogging, making fuel quality and service adherence critical.
Analysis derived from Renault technical bulletins (2007-2012) 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 748 is generally robust with its cast iron block, but its longevity heavily depends on maintenance. The high-pressure fuel pump is a known weak point, especially with poor fuel. Using high-quality diesel and adhering to strict oil change intervals (20,000 km) with RN0700/RN0710 oil is crucial for long-term reliability beyond 200,000 km.
The most frequent issues are high-pressure fuel pump failures, EGR valve/carbon buildup causing running problems, and DPF clogging from short trips. Turbo actuator faults are also common. These are well-documented in Renault service bulletins and owner reports.
This 1.9 dCi engine was primarily used in the Renault Megane III (2008-2011), Scénic III (2009-2011), and Laguna III (2007-2010) in 130 PS and 150 PS variants. It was also fitted to the Nissan Primera P12 facelift (2007-2008) in the 130 PS version.
Yes, the F9Q 748 responds well to ECU remapping. Stage 1 tunes can safely increase power to 170-180 PS and torque to 360-380 Nm. The stock internals are generally strong enough for these gains. Further power requires upgraded turbo, injectors, and clutch. Always use supporting modifications and high-quality fuel.
Fuel economy is very good for its era. In a Megane III 1.9 dCi 130, expect around 5.5 L/100km (51 mpg UK) combined. The 150 PS variant is slightly thirstier at ~6.0 L/100km (47 mpg UK). Real-world figures depend heavily on driving style and DPF regeneration cycles.
Yes. The F9Q 748 is an interference engine. If the timing chain were to fail or jump, the pistons would collide with the open valves, causing catastrophic internal engine damage. Fortunately, the front-mounted chain is generally reliable with proper oil changes.
Renault mandates the use of RN0700 or RN0710 specification oil, typically a 5W-30 synthetic. This specific formulation is designed for the engine's emissions systems (DPF, EGR) and provides necessary protection for the turbocharger and timing chain. Using the correct oil is non-negotiable for reliability.
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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