The Renault F4R 738 is a 1,998 cc, inline‑four petrol engine produced between 1998 and 2002. It features a cast‑iron block, aluminium head, and a double overhead camshaft (DOHC) with four valves per cylinder. In standard European specification, it produced 100 kW (136 PS) and 180 Nm of torque, offering refined performance for its class.
Fitted primarily to the Renault Laguna I (Phase 2) and Megane I models, the F4R 738 was engineered for smooth, responsive performance in mi…
Production years 1998–2002 meet Euro 2 standards (VCA UK Type Approval #VCA/EMS/5683).
The Renault F4R 738 is a 1,998 cc inline‑four petrol engine engineered for mid-size hatchbacks and saloons (1998-2002). It combines a robust cast‑iron block with a DOHC 16-valve valvetrain to deliver smooth, responsive performance. Designed to meet Euro 2 standards, it balances power delivery with emissions compliance.
| Parameter | Value | Source |
|---|---|---|
Displacement | 1,998 cc | |
Fuel type | Petrol | |
Configuration | Inline‑4, DOHC, 16‑valve | |
Aspiration | Naturally aspirated | |
Bore × stroke | 82.7 mm × 93.0 mm | |
Power output | 100 kW (136 PS) @ 6,000 rpm | |
Torque | 180 Nm @ 3,750 rpm | |
Fuel system | Multi-point fuel injection | |
Emissions standard | Euro 2 | |
Compression ratio | 10.5:1 | |
Cooling system | Water‑cooled | |
Turbocharger | None | |
Timing system | Chain‑driven camshafts | |
Oil type | Mineral 10W‑40 or semi-synthetic 5W-40 | |
Dry weight | Not specified in available documentation |
The Renault F4R 738 was used across Renault's Laguna I and Megane I platforms with transverse mounting. This engine received minor platform-specific adaptations-different intake manifolds and ECU mappings for various models-and no significant facelift revisions during its production run, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.
The F4R 738's primary reliability risk is exhaust camshaft phase variator failure, with elevated incidence in high-mileage or poorly maintained vehicles. Renault internal service data indicated this was a common workshop repair, while the mechanical design otherwise proved very durable. Regular oil changes with correct specification make using updated replacement hardware critical.
Analysis derived from Renault technical bulletins (1998-2003) and owner club maintenance records (1999-2023). 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
Yes, the F4R 738 is generally reliable with proper maintenance. The main known weakness, the exhaust camshaft phase variator, is easily rectified with updated parts. Regular oil changes with the correct specification are critical for longevity. With care, these engines can easily surpass 250,000 km.
The most frequent issues are exhaust camshaft phase variator failure, fuel injector clogging or regulator failure, timing chain tensioner wear, and oil leaks from the rocker cover gasket. Most problems are preventable with regular maintenance and using the correct oil.
The F4R 738 was primarily used in the first-generation Renault Laguna (Phase 2, 1998-2002) and the first-generation Renault Megane (1998-2002), including hatchback, saloon, and coupe variants. It was the higher-output 2.0L petrol engine for these models.
Minor gains are possible. Options include fitting a performance exhaust, remapping the injection ECU, or installing a higher-flow air filter. Significant power increases are limited by the naturally aspirated design. Most tuning focuses on improving throttle response and drivability.
Real-world fuel economy is around 8.6 L/100km (33 mpg UK) in mixed driving for a Renault Laguna. Highway cruising can yield 6.6 L/100km (43 mpg UK), while city driving may consume 10.8 L/100km (26 mpg UK). Results vary significantly with driving style and vehicle condition.
Yes. The F4R 738 is an interference engine. If the timing chain were to fail or jump, the pistons and valves will collide, causing severe internal engine damage. This makes regular inspection of the timing system critical.
Renault specified a mineral 10W-40 or semi-synthetic 5W-40 engine oil for the F4R 738. Using a quality oil that meets ACEA A3/B3 standards is recommended. Oil should be changed every 10,000 km or 12 months to ensure proper lubrication of the camshaft variator and timing components.
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
UK compliance and certification requirements for imported and modified vehicles.
VCA Certification Portal
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