Citroen Nemo Diesel Particulate Filter DPF (2007-2017)

A Diesel Particulate Filter (DPF) is an anti-pollution device fitted on diesel vehicles like the Citroën Nemo, located after the catalytic converter and before the exhaust silencer. It traps up to 99 % of fine particles (soot and ash) produced by diesel combustion, which are harmful and carcinogenic.

The DPF consists of a ceramic body (cordierite or silicon carbide) structured as a microscopic honeycomb of about 50 channels per cm² inside a stainless steel casing. Exhaust gases are forced through porous walls that trap the particles.

The DPF works through two main phases:

• Filtration : Soot accumulates forming a filtering layer, which increases backpressure, potentially clogging the engine and reducing power.
• Regeneration : This process burns off soot to clean the filter. It occurs in two ways:
  • Passive regeneration : At low engine load, aided by the EGR valve, post-injection, and turbo heating, burning soot into CO2, water and ash.
  • Active regeneration : Triggered by the vehicle's computer when detecting increased backpressure, typically every 500–700 km for 5–15 minutes.

Ash residue that cannot burn accumulates over time and requires filter replacement. Manual regeneration via diagnostic tools is recommended for short or urban driving.

All recent diesel versions of the Citroën Nemo utility vehicle (2008-2020) have a DPF, except the 1.4 petrol 73 hp model:

• 1.3 BlueHDi 80 hp – Euro 6 (2016-2020)
• 1.3 HDi 75 hp (2008-2020)
• 1.4 HDi 68 hp (2008-2016)
• 1.4 73 hp petrol - No DPF

Common issues include the DPF warning light due to soot buildup, especially on short trips, remediable by cleaning or regeneration.

Replacement costs vary by model and garage, averaging around €1,118 including removal and fitting:

• 1.3 BlueHDi 80 hp: €1,118 – €1,157 (approx. 1h 18min)
• 1.3 HDi 75 hp: €307 – €439 (approx. 1h 18min)
• 1.4 73 hp petrol: €1,127 – €1,168 (approx. 1h 16min)
• 1.4 HDi 68 hp: €1,154 – €1,208 (approx. 1h 48min)

Step-by-step DIY guides for cleaning and changing the DPF on Nemo models are available to assist owners.

Maintenance tips include:

• Avoid frequent short trips to allow natural regeneration at higher engine speeds.
• Use a diagnostic tool to force regeneration if needed.
• Clean the DPF periodically; tutorials and video guides exist for the Nemo 2012 model.
• Perform engine decarbonisation if the DPF warning light stays on.

Proper maintenance extends DPF life and ensures vehicle performance.

Common problems include DPF clogging leading to:

• Illuminated DPF warning light on dashboard
• Loss of engine power and increased fuel consumption
• Increased backpressure causing potential engine issues

These often result from frequent short-distance driving preventing proper regeneration. Cleaning or replacement may be necessary to restore normal function.

Yes, resetting the ECU after replacing the DPF and resetting the DPF additive counter are different procedures. After installing a new DPF, the ECU must be reset to recognize the new filter and adjust engine settings accordingly.

• Resetting the DPF additive counter clears the soot accumulation data stored in the ECU.
• Resetting the ECU typically involves recalibrating sensors and adaptation values for optimal performance.

Both should be performed with appropriate diagnostic tools to ensure correct operation and emission compliance.

Krosfou offers new, high-performance DPF products for the Citroën Nemo with a 3-year warranty and certified quality equal or superior to original parts. These products feature advanced stainless steel construction and unique monolith technology for durability and efficiency.

• Certified by TÜV SÜD, meeting European regulation E24-103R standards
• Manufactured using the latest 2025 technology
• Available for all major diesel Nemo models
• Backed by direct factory support and technical assistance

Ordering from a trusted manufacturer ensures reliable quality, performance, competitive pricing, and delivery options tailored to your needs.