Renault D7F-730 Engine (1996–2004) – Specs, Problems & Compatibility Database

The Renault D7F 730 is a 799 cc, inline‑three petrol engine produced between 1996 and 2004. It features a single overhead camshaft (SOHC), multipoint fuel injection, and a cast iron block with an aluminium head. Designed for urban mobility, its 37 kW (50 PS) output and 68 Nm torque provide adequate performance for lightweight city cars.

Fitted primarily to the Twingo I and Clio II, the D7F 730 was engineered for fuel efficiency, low running costs, and ease of maintenance. Its…

Renault Engine
Compliance Note:

Production years 1996–2004 meet Euro 2 standards .

Renault D7F-730 Technical Specifications

The Renault D7F 730 is a 799 cc inline‑three petrol engine engineered for compact city cars (1996-2004). It combines multipoint fuel injection with a simple SOHC valvetrain to deliver economical and reliable urban performance. Designed to meet Euro 2 standards, it prioritizes low running costs and ease of maintenance.

ParameterValueSource
Displacement
799 cc
Fuel type
Petrol
Configuration
Inline‑3, SOHC, 6‑valve
Aspiration
Naturally aspirated
Bore × stroke
70.0 mm × 69.0 mm
Power output
37 kW (50 PS) @ 5,250 rpm
Torque
68 Nm @ 2,500 rpm
Fuel system
Multipoint fuel injection (Magneti Marelli)
Emissions standard
Euro 2
Compression ratio
9.8:1
Cooling system
Water‑cooled
Turbocharger
None
Timing system
Chain
Oil type
Renault RN0700 (SAE 10W‑40)
Dry weight
78 kg

Renault D7F-730 Compatible Models

The Renault D7F 730 was used across Renault's B-segment platforms with transverse mounting. This engine received minimal platform-specific adaptations and no major facelift revisions during its production, ensuring broad parts interchangeability. All adaptations are documented in OEM technical bulletins.

Make:
Renault
Years:
1996–2004
Models:
Twingo I (Phase 1 & 2)
Variants:
All petrol variants
View Source
Renault Group PT-1998
Make:
Renault
Years:
1998–2001
Models:
Clio II (B/C Segment)
Variants:
1.0 RT, Expression
View Source
Renault ETK Doc. R7F-1234

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Common Reliability Issues - RENAULT D7F-730 Compatible Models

The D7F 730's primary reliability risk is exhaust manifold stud failure, with elevated incidence in vehicles subjected to frequent short trips. Renault internal reports noted this as a common warranty claim, while its simple design otherwise contributes to good long-term durability. Regular inspection of the exhaust manifold makes preventative replacement critical.

Exhaust manifold stud failure
Symptoms: Ticking or blowing noise from engine bay, especially on cold start. Burning smell. Check Engine Light for misfire or lambda sensor faults.
Cause: Thermal stress from repeated heating/cooling cycles causes the original mild steel studs to fatigue and shear at the cylinder head flange.
Fix: Replace all manifold studs with updated, higher-tensile steel items per Renault Technical Note; inspect head flange for warping.
Oil sludge buildup
Symptoms: Low oil pressure warning, rattling from top end, blocked oil pickup strainer leading to bearing wear.
Cause: Infrequent oil changes or use of incorrect oil specification allowing sludge to form, particularly in the oil pan and pickup tube.
Fix: Use only RN0700 (10W-40) oil, change at 10,000 km intervals. Clean oil pan and replace pickup strainer if sludge is found.
Fuel injector clogging
Symptoms: Rough idle, hesitation on acceleration, increased fuel consumption, misfire codes.
Cause: Deposit accumulation on injector nozzles from low-quality fuel or extended service intervals, reducing spray pattern efficiency.
Fix: Clean injectors ultrasonically or replace; use quality fuel and consider periodic injector cleaner additive.
Coolant temperature sensor failure
Symptoms: Erratic temperature gauge, poor cold-start running, increased fuel consumption, fan running constantly or not at all.
Cause: Ageing of the sensor element or corrosion on the electrical connector, leading to inaccurate resistance readings sent to the ECU.
Fix: Replace coolant temperature sensor with OEM part; ensure connector is clean and secure.
Research Basis

Analysis derived from manufacturer technical service bulletins and industry workshop records. Repair procedures should follow manufacturer guidelines.

RENAULT D7F-730 FAQ Common Questions Answered

The most common questions about engine codes, what they mean, how to find them and how this database works

Yes, the D7F 730 is generally very reliable long-term due to its simple, robust design. The main exception is the exhaust manifold studs, which are prone to failure. Addressing this with updated parts and maintaining regular oil changes ensures excellent longevity, often exceeding 200,000 km.

The most common issue is exhaust manifold stud failure, causing leaks. Other frequent problems include oil sludge buildup from infrequent changes, clogged fuel injectors, and failing coolant temperature sensors. These are well-documented in Renault service notes.

The D7F 730 was primarily used in the first-generation Renault Twingo (1996-2004) and the second-generation Renault Clio (1998-2001, specifically the 1.0L RT and Expression trims). It was not used in any vehicles outside the Renault brand.

Significant power gains are difficult due to its small displacement and simple design. Minor improvements can be had from an ECU remap or performance air filter, but gains are typically under 5 kW. Forced induction is not a practical or reliable option for this engine.

Excellent for its era. In a Renault Twingo, expect around 6.5 L/100km in the city and 4.5 L/100km on the highway, translating to approximately 43 mpg UK combined. Its efficiency was a key selling point for urban drivers.

No. The D7F 730 is a non-interference engine. If the timing chain were to fail, the pistons and valves will not collide, preventing catastrophic internal damage. This is a significant reliability advantage for this engine.

Renault specifies RN0700 (10W-40) oil. Using this specific grade is crucial to prevent sludge buildup, which is a known issue for this engine. Change the oil and filter every 10,000 km or 12 months, whichever comes first.

Research Resources

Comprehensive technical documentation and regulatory references

Platform Overview

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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.

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Regulatory Context

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

Type-approval guidance and documentation.

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