Exhaust Renault Fluence (2009-2020)

Renault Fluence vehicles, especially the 1.6 16V 110 hp petrol and dCi 90 FAP diesel models, often face exhaust system problems between 50,000 and 120,000 km. Common issues include abnormal noises, exhaust leaks, and sensor failures without specific dashboard warnings but noticeable sounds.

The buzzing noise can happen when the heat shield of the silencer bends after driving through deep puddles, causing contact with exhaust elements. Metallic ringing is often heard during cold starts or engine warm-up. Repositioning or bending the thermal shield can resolve these sounds.

Loud clicks or excessive noise in the exhaust is common on dCi 90 FAP diesel (clacking) and 1.6 petrol models (excess noise). This is usually due to exhaust component wear or leaks and is detectable by sound but not by specific dashboard warnings.

• Check exhaust leaks upstream of the catalytic converter as they can cause error codes.
• Lambda sensor or exhaust backpressure sensor faults frequently cause related alerts and symptoms.

Professional diagnostics with OBD and specialist garages are recommended for accurate troubleshooting.

Start by listening for noises when the engine is cold and warm, then visually inspect the heat shield and gaskets for damage. Use an OBD scanner to check sensors such as lambda, NOx, and backpressure.

• Replace vulnerable parts like the silencer, NOx catalytic converter (diesel), sealing rings, and thermal shield around 100,000 to 120,000 km.
• Avoid deep water puddles to prevent thermal shield deformation.
• Regular checks during service intervals can prevent premature failures.

Engaging certified garages and using accurate diagnostics is key for proper repair.

Exhaust sensors are critical for controlling emissions and engine performance. Key sensors are:

• Lambda sensor: Monitors oxygen in exhaust gases and influences fuel control.
• NOx sensor: Detects nitrogen oxide levels, important for diesel emission control.
• Backpressure sensor: Detects exhaust pressure to identify filter blockages or leaks.

Faulty sensors often cause error codes and trigger engine alerts, so professional sensor diagnostics and replacement are essential.

Several specialized communities and platforms provide diagnostic tips and user experiences for Renault Fluence exhaust issues:

• MyCarly Community: User forums on catalytic converter leaks, sensor faults, and OBD diagnostics.
• My-ProCar: Access to certified garages for noisy or clacking exhaust repairs.
• Auto-Doc Club: DIY tutorials for changing exhaust parts with vehicle-specific guidance.
• YouTube Technical Videos: Visual guides on common Fluence exhaust checks and problem diagnostics.

These resources help owners understand and manage exhaust system maintenance effectively.

The main exhaust components include:

• Stainless steel exhaust pipes connecting engine to the rear outlet.
• Catalytic converter responsible for reducing toxic emissions.
• Diesel Particulate Filter (DPF) on diesel models to trap particulate matter.
• Silencer/muffler to reduce noise levels.
• Sensors such as oxygen (lambda), NOx, and backpressure sensors for emission control and engine management.
• Heat shields protecting surrounding parts from exhaust heat.
• Mounting gaskets, clamps, and hangers securing the system.

These parts work together for optimal exhaust flow, emission control, and sound reduction.

Krosfou provides high-quality exhaust components including catalytic converters and DPFs made from stainless steel with advanced technology. The key benefits include:

• A 3-year warranty valid up to 100,000 km, covering manufacturing defects.
• Free returns within 30 days for unused and original condition products in Europe.
• Direct factory support with technical assistance.
• Fast shipping options including express delivery across Europe and internationally.
• Quality certified by TÜV SÜD Automotive, ensuring superior or equal performance to original parts.
• Accessories include stainless steel, black or silver polished tailpipes and mounting components compatible with Renault Fluence models.

Customers are advised to install parts professionally, follow manufacturer instructions, and maintain sensors for full warranty coverage and optimal exhaust system function.