Fuel Additive Tank & Pump with Eolys Fluid for Citroen, Peugeot & Vauxhall | 9817154080 | 9852029780

The DPF fuel additive tank and pump with EOLYS fluid (OE 9817154080 / 9852029780) is a complete replacement emission-control assembly designed for modern Citroën, Peugeot and Vauxhall BlueHDi diesel vehicles. This unit combines the EOLYS (PAT) additive reservoir with the dosing pump to store and inject specialised additive fluid into the diesel fuel system, lowering soot combustion temperatures so the diesel particulate filter (DPF) can regenerate more effectively, prevent blockages and reduce the likelihood of emission-related warning codes. This direct-fit assembly matches original manufacturer specifications to ensure proper function and long-term reliability.

OEM Number: SU001A5591, SU001B4786, 9817154080, 9806830680, 9852029780, 9852190880

Number of pins : 3-pin connector

Placement on Vehicle : Underfloor

Emission Standard : Euro 5

Quantity : 1

Our SKU: TC9817154080_94 

All our Citroen Peugeot Fuel Additive Tank Pump Eolys Fluid 2.0 1.6 HDi 9817154080 are OEM quality and reliable after market car parts. This Citroen Peugeot Fuel Additive Tank Pump Eolys Fluid 2.0 1.6 HDi 9817154080 is specifically compatible with Citroën: C5 Aircross, Dispatch, Jumpy Bus (V_), Spacetourer, Spacetourer Bus (V_), Opel: Grandland / Grandland X, Vivaro, Zafira Life, Peugeot: 3008, 5008, Expert, Traveller, Vauxhall: Grandland X / Grandland, Vivaro, Vivaro Life, .

Please use our make-model-year tool to check this part's compatibility with your vehicle. However, please note that our tool is for reference only and we recommend that you check the part number on your old unit prior to purchasing.

If you are still not sure about the compatibility of this part to your vehicle, please supply us with the VIN number or Reg number in our live chat or contact form! You can also find details on our purchasing & shipping guide here.

Key Benefits

✔ Complete Additive Tank + Pump Assembly
Includes both the reservoir and dosing pump in one unit, simplifying replacement and ensuring correct additive delivery every time.

✔ OEM-Equivalent Fitment
Matches OE part numbers 9817154080 and 9852029780, offering a direct replacement for the original emission system component.

✔ Supports Efficient DPF Regeneration
Accurate dosing of EOLYS additive lowers soot combustion temperature, enabling the DPF to burn off soot effectively and maintain emission-control performance.

✔ Helps Prevent Emission Faults
A failing or empty additive tank/pump often triggers DPF warning lights and fault codes — installing a new assembly helps restore proper system operation.

✔ Durable Fuel-System Component
Built with quality materials and designed to withstand typical engine bay conditions — heat, vibration and prolonged use — for dependable service life

Frequently Asked Questions (SEO-Optimised)

Q: What is a fuel additive tank and pump?
A fuel additive tank and pump stores diesel particulate filter additive (EOLYS/PAT fluid) and delivers a precise dose into the fuel/exhaust system when commanded by the engine control unit, helping the DPF regeneration process work at lower temperatures.

Q: Why does my vehicle need an additive pump?
Modern diesel engines use additive fluid to assist DPF regeneration; if the additive pump fails or the fluid runs low, the DPF cannot regenerate correctly, which can lead to warning lights, soot buildup and reduced engine performance.

Q: Which vehicles is this compatible with?
This additive tank and pump assembly suits many PSA Group diesel models — including Citroën Dispatch, Peugeot 3008, Vauxhall Vivaro and other BlueHDi diesels that specify 9817154080 / 9852029780 — always verify using your VIN and OEM part number before purchase.

Q: How does the additive help the DPF?
Additive fluid (EOLYS/PAT) contains catalysts that reduce the soot burn-off temperature, enabling efficient and regular regeneration cycles and extending the life of the particulate filter.

Q: Can I refill the additive myself?
Some systems allow refill and reset via specialist tools; professional servicing ensures correct calibration and prevents system errors.