Exhaust Citroen DS4 (2011-2015)

The Citroën DS4, especially diesel models such as the 1.6 e-HDi 115 hp or HDi 110 FAP, frequently face exhaust system problems including clogged Diesel Particulate Filters (DPF), sensor failures, malfunctioning exhaust flaps, and leaks causing odors or smoke. Warning messages like "DPF almost clogged" often appear after 30,000-35,000 km due to diesel particulate accumulation and additive deposits. Other issues include faulty backpressure sensors that prevent proper DPF regeneration, defective exhaust flaps requiring professional replacement, and leaks that trigger engine warnings and irregular engine behavior.

The DPF becomes clogged due to the buildup of diesel particulates and residues from PSA additives. Regeneration requires the exhaust to reach 400-450°C for 10-15 minutes, typically needing highway driving at 75-100% load and around 3000-3500 rpm. If the clogging is severe, forced regeneration by the engine control unit may fail, leading to limp mode and requiring a garage visit for physical cleaning or DPF replacement.

The DS4 models built between 2011 and 2018 have known reliability concerns with their DPF, NOx systems, and pollution control components. Key recalls have involved:

• AdBlue/NOx system failures due to urea crystallization deforming reservoirs and injectors (BlueHDi engines), with recalls up to end 2015.
• Vacuum pump issues impairing brake function for diesels made 2013-2017.
• Starter cable short-circuit caused by EGR valve contact in 2014-2017 models.
• Injector seizing and frequent DPF blockages in 1.6 e-HDi 115 and HDi 110 engines.

Other reminders related to airbags or engine timing do not directly affect the exhaust system.

Effective diagnostic and solutions include:

• Manual DPF regeneration by driving on highways at high speed and load before critical clogging occurs.
• Using diagnostic tools like MyCarly to check sensor and DPF status.
• Professional cleaning or replacement of the DPF if regeneration fails.
• Replacing faulty exhaust flap actuators, backpressure sensors, or injectors as needed.
• Regular maintenance including additive refills and avoiding frequent short trips.

Consult Citroën/PSA garages or qualified mechanics for repairs. Online platforms can provide repair quotes and support.

Krosfou offers new, high-performance exhaust parts including Diesel Particulate Filters (DPF) and catalytic converters for Citroën DS4, manufactured in stainless steel INOX 409 with premium ceramic monoliths. These products meet or exceed European regulations, are TÜV SÜD certified, and come with a 3-year warranty limited to 100,000 km of use.

Krosfou products provide high technical quality, durability, and help improve vehicle performance while complying with legal emission standards. The company provides direct factory support, free returns within 30 days, and prioritizes environmental responsibility by offering used part recycling services.

To ensure long-lasting and efficient exhaust system operation:

• Drive regularly on longer routes at higher speeds to allow natural DPF regeneration.
• Follow scheduled maintenance to refill exhaust system additives essential for DPF performance.
• Address warning messages promptly to avoid severe damage or limp mode.
• Use quality exhaust components, such as stainless steel parts, to withstand corrosion and wear.
• Have diagnostics performed by experts using professional tools to detect sensor or flap faults early.

Adhering to these guidelines helps maintain optimal emission control and engine power.

Yes, exhaust replacements must comply with local emission legislation and vehicle certification standards. Key points include:

• Using parts certified to E24-103R regulation and meeting Euro emission standards.
• Replacing related sensors, gaskets, and injectors during exhaust system repairs.
• Proper installation by qualified professionals to ensure sensor alignment and system tightness.
• Only permitting vehicles originally equipped with catalytic converters to use them post-replacement.
• Using copper connections when installing exhaust components to avoid damage and leaks.

Improper replacement or use of uncertified parts may void warranties and lead to legal penalties.

Additional resources and support include:

• Online forums and communities discussing DS4 exhaust issues and repair tips.
• Diagnostic tool providers specializing in Citroën exhaust sensors and DPF.
• Official service centers and automotive garages offering Krosfou exhaust products and expert installation.
• Customer support from manufacturers focusing on high-quality stainless steel exhaust components.
• Social media platforms such as Instagram and Facebook for the latest updates about exhaust system development and brand news.

Checking your vehicle’s VIN at official dealerships ensures awareness of recalls and compatible parts. Choose quality products and trusted technical support for safe and effective exhaust system maintenance.