Exhaust Volvo S40

Common exhaust issues on the Volvo S40 include malfunctioning exhaust valves (clapets), faulty exhaust pressure sensors especially on diesel engines, exhaust leaks causing abnormal noises or smoke, and white smoke emissions often related to head gasket problems. Inspections by professionals are recommended for accurate diagnostics and repairs.

A defective exhaust valve is typically indicated by an error code related to the valve operation. The root cause is often a faulty valve itself. The recommended solution is to have the valve inspected and, if necessary, replaced by a qualified technician to restore proper exhaust system function.

Symptoms include error codes related to exhaust pressure in diesel engines. The typical cause is a faulty exhaust back pressure sensor. Solutions involve correcting or replacing the faulty sensor. Prompt repair can prevent further exhaust system damage and maintain engine performance.

• Check for diagnostic error codes related to pressure sensor
• Inspect the sensor wiring and connections
• Replace the sensor if found defective

Professional service is advised for accurate testing and replacement.

White smoke often indicates a head gasket issue which affects the exhaust and cooling systems. This can lead to coolant entering the exhaust, causing white smoke.

• Check for coolant leaks or low coolant levels
• Inspect head gasket condition
• Perform necessary gasket replacement if required

Immediate inspection and repair are important to avoid engine damage.

Excessive exhaust noise without dashboard warnings is commonly due to leaks in the exhaust system, damaged mufflers, or faulty piping.

• Perform visual and auditory inspections for leaks or holes
• Check muffler and exhaust pipe condition
• Repair or replace damaged components

Regular maintenance can prevent noise and performance issues.

Krosfou offers high-quality, new exhaust components including diesel particulate filters (DPF) and catalytic converters designed with stainless steel construction for durability and performance. Their products feature 3-year warranties and comply with strict European emission standards.

These parts are designed to fit various Volvo S40 year and engine models and come with free shipping options across Europe and international deliveries.

• Stainless steel construction for steel durability
• Certified performance compliant with European regulations
• Fast shipping and free returns within 30 days
• 3-year warranty with professional installation

Check product pages for exact fit by engine type, model year, and emission standard (Euro 4, 5, or 6).

Krosfou exhaust products are manufactured with high-grade stainless steel and advanced ceramic monolith technologies, offering reliable performance, improved power output, and reduced emissions. Customers benefit from competitive prices, quick shipping, and expert technical support.

• High-performance parts that can increase vehicle power
• Reliable and durable construction ensuring long life
• Expert customer and technical support, including installation guides
• Exclusive PRO discounts and loyalty programs available

Choosing authentic, manufactured exhaust parts ensures optimal vehicle operation and compliance with emission standards.

Proper installation by professional garages specializing in exhaust systems is essential to maintain warranty coverage. Specific conditions include:

• Replacing gaskets, sensors, and injectors as recommended
• Following manufacturer’s fitting instructions carefully
• Avoiding vehicle operation that harms parts (e.g., short trips limiting DPF regeneration)
• Using the correct parts for your engine size and emission requirements

The warranty covers 3 years or up to 100,000 km use, starting from the date of receipt. Claims require a completed technical support form. Faults caused by negligence or improper use void the warranty.

For support, Krosfou offers email assistance and installation manuals online.