Exhaust Renault Fluence (2009-2020)

The Renault Fluence, including petrol 1.6 16V 110 hp and diesel dCi 90 FAP models, commonly experience exhaust system faults between 50,000 and 120,000 km. Issues reported include abnormal noises, exhaust leaks, and sensor failures.

The silencer’s heat shield can deform after driving through deep water, causing it to touch other exhaust components and produce an annoying buzzing sound. The solution is to carefully bend the heat shield back into position.

Metallic ringing sounds from the silencer typically appear during cold starts or engine warm-up phases. This can be a normal symptom linked to metal components expanding and contracting with temperature changes.

On pre-restyling Fluence models with manual transmission, the sealing ring may burn out between 100,000 and 120,000 km, causing a characteristic roaring noise from the exhaust system.

Diesel Fluence dCi 90 FAP models often experience clacking sounds, while petrol models may generate excessive noise without dashboard warnings. Auditory signs coupled with a professional diagnostic, possibly found via specialised garages, can pinpoint the issue.

Exhaust leaks may occur:

• Upstream of the catalytic converter, often due to premature ageing, which triggers error codes.
• Related to oxygen sensor faults, confirmed by professional diagnostics.
• Caused by the exhaust back pressure sensor on certain diesel models, indicated by engine warning lights.

Inspection and timely repair of leaks are essential to maintain performance and comply with emission standards.

Recommended resources include:

• MyCarly Community – Forums discussing NOx catalytic converter leaks, oxygen sensors, and back pressure sensor issues with real user feedback and error codes.
• My-ProCar – Certified garages specializing in clacking or noisy exhaust diagnostics and repairs.
• Auto-Doc Club – DIY tutorials for Fluence exhaust repairs and compatible parts guidance.
• YouTube – Technical videos reviewing Fluence exhaust system checks pre-purchase.

For maintenance and accurate diagnosis:

• Listen carefully for unusual noises when the engine is cold and hot.
• Visually inspect heat shields, joints, and seals.
• Use OBD tools to test sensors such as the oxygen lambda sensor, NOx sensor, and back pressure sensor.
• Replace vulnerable parts like the silencer, catalytic converter, DPF, sealing rings, and heat shields around 100,000–120,000 km.
• Avoid driving through deep water to prevent heat shield deformation.
• Perform checks during regular servicing intervals, including oil changes and timing belt replacements.

Professional diagnostics at authorized Renault garages or using advanced tools is essential for specific issues. Forums and communities can provide additional support and updates.