Exhaust Renault Scenic

Common exhaust problems, especially in Renault Scenic 3 and Grand Scenic diesel models (1.5 dCi, 1.6 dCi, 1.9 dCi FAP), include a stuck or blocked exhaust gas valve, clogged catalytic converter or DPF, cracked hoses, and defective flaps. These issues can cause power loss, whistling noises, dashboard warning messages such as "antipollution to check" or "injection to check," and exhaust leaks.

Symptoms of exhaust faults often include:

• Loss of power and decelerations due to blocked valves or clogged catalytic converters limiting gas flow.
• Abnormal noises such as whistling on acceleration caused by air or gas leaks in the exhaust or EGR system.
• Error messages on the dashboard related to emissions or injection system checks.
• Presence of black oil or liquids within exhaust ducts, possibly from faulty intercooler hoses.
• Increased engine back pressure, risking engine damage like piston or ring wear.

Main problematic components include:

• Exhaust gas valve: tends to get stuck or welded after the engine, requiring regular lubrication with a degreaser like WD40.
• EGR valve and hoses: blockage can introduce oil into exhaust conduits; intercooler hoses may crack and leak.
• Turbo and turbo hose gaskets: missing or damaged turbo hose gaskets cause air leaks and power loss.
• Catalytic converter / DPF: blockage results in restricted exhaust flow and high engine backpressure.
• Exhaust flap actuator: malfunctioning actuator affecting exhaust flow control.
• General exhaust system: damage or blockage can lead to premature engine wear; rodents may damage rubber hoses making anti-bird mesh useful.

These issues primarily affect Scenic 3 1.5 dCi, 1.6 dCi, and Grand Scenic 1.9 dCi FAP models.

Yes, some repairs and maintenance are possible as DIY:

• To free a stuck exhaust gas valve, elevate the car, remove the EGR valve (two bolts), spray WD40 onto the valve shaft and spring, and manually work the valve open and closed until smooth, then reinstall.
• Replace cracked intercooler hoses or turbo gaskets after proper diagnosis.
• Regularly apply degreaser and replace air and fuel filters at recommended intervals (20,000 km for air, 40,000 km for fuel).

More complex repairs like replacing the catalytic converter, turbo components, or conducting diagnostics should be done by professionals.

Preventive care includes:

• Regularly applying degreaser to the exhaust gas valve every 4 months, especially in winter with road salt exposure.
• Changing air and fuel filters according to manufacturer intervals to maintain engine and exhaust efficiency.
• Cleaning injectors and DPF periodically to prevent clogging.
• Reprogramming the engine management system after repairs to optimize combustion and emissions.
• Installing protective meshes to prevent damage from rodents to rubber hoses.
• Prompt diagnostic checks when warning messages appear to prevent engine damage.

Following these rules helps ensure your Scenic's exhaust runs smoothly and extends engine life.

Repair costs vary based on parts and labor, with examples including:

• Exhaust gas valve replacement including labor: approximately €265 with genuine Renault parts.
• Intercooler hose replacement (part reference 144603264R): around €135 plus labor costs.
• Turbo joints, injectors, or catalytic converter replacements require diagnosis via OBD and can be more expensive.

Costs depend on local garage prices and part sourcing; always consult trusted professionals or authorized garages for precise quotes and quality repair services.

Krosfou offers brand-new, high-quality exhaust parts including catalytic converters and DPFs made in Europe with stainless steel and advanced technology. Key features include:

• 3-year warranty limited to 100,000 kilometers of use.
• Products meet or exceed European regulation standards and TÜV SÜD certifications.
• Direct factory supply ensuring unbeatable quality-to-price ratio.
• Fast delivery options across Europe and worldwide.
• Free returns within 30 days for unused parts in original packaging.
• Expert technical support and installation guides available by email.

For professionals and customers, Krosfou's products ensure long-lasting, reliable emission system performance for your Renault Scenic.

If you need further assistance, technical support, or installation manuals for Krosfou exhaust parts:

• Contact Krosfou customer support via email at support@krosfou.com.
• Use your PRO account for direct access to downloadable catalogs, credit notes, and exclusive discounts.
• Provide your vehicle VIN or original part numbers to confirm compatibility securely.
• Access loyal customer benefits such as free shipping, buy-back of used parts, and technical advice.

For complex diagnostics or repairs, consult authorized garages to ensure safety, correct fitting, and optimal performance of your Renault Scenic exhaust system.