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Adblue system
By OE Match
- Porsche 958 Cayenne V6 3.0L Diesel (245Hp) 2010-17
- Porsche 958 Cayenne S V8 4.2L Diesel (382Hp) 2010-17
The AdBlue pump is responsible for drawing urea solution (AdBlue) from the tank and delivering it under pressure to the injector/nozzle. Because AdBlue is corrosive and operates in a harsh environment (with potential crystallization, heat, etc.), the pump internals (seals, diaphragms, valves, sensors) can degrade over time.
A repair kit for the AdBlue pump is a kit that contains internal components (e.g. seals, diaphragms, O-rings, valves, sometimes membrane or small internal parts) to refurbish an existing pump instead of replacing the full assembly. The idea is to renew the “wear items” inside the pump that tend to fail first.
Product reference number 95811390300 is the repair set / kit corresponding to the AdBlue pump for certain Porsche Cayenne 958 (diesel) models.
Fits:
Porsche 958 Cayenne 3.0L Diesel 2011-18 *cars without activated carbon canister with SCR (option code: 1E9)
Porsche 958 Cayenne S 4.2L Diesel 2011-18 *EU6 plus exhaust concept (option code 7MM)
Why these repair kits are needed / when to replace
Pump failure or malfunction
The pump ceases to draw or deliver AdBlue solution properly.
Dosing errors (under or over dosing) cause emissions faults or “AdBlue system malfunction” warnings.
The ECU or emission control module detects that the pump can’t maintain required pressure.
Leaks / seal degradation
The internal seals, O-rings, membranes can degrade, harden, crack or leak from exposure to urea, heat cycles, crystallization, contamination.
Leaks may manifest as fluid loss, crystallized deposits, or detection of low AdBlue despite tank level being fine.
Clogging / contamination / crystallization
Urea solutions tend to crystallize if they dry or if concentration levels are off. Crystals can obstruct internal passages or damage internal parts.
Foreign particles or contamination in the fluid can damage valves, check components or rub against internal surfaces.
Wear / fatigue of internal moving parts
The pump generally has moving parts (diaphragms, pistons, valves) that wear or fatigue over time.
The dosing pump is cycled many times, so mechanical wear is expected after service life.
Electrical / sensor elements
Some pumps or kits may include or interface with sensors or pressure regulation elements; if those fail, the pump may be flagged even if mechanical parts are intact.
Click 'Zoom in' for large part diagram.
Diagram ref no 8
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
95811390300
The product you are viewing cross references to these numbers
OEMatch Adblue system — Fit, Function, Confidence
AdBlue systems reduce nitrogen oxide (NOx) emissions by dosing a urea solution into the exhaust stream. OEMatch supplies pumps, injectors, tanks, sensors and control modules for Porsche models, with parts chosen and documented to support model-specific repairs and system servicing for diesel and hybrid engines.
Available Types
- AdBlue pumps
- AdBlue injectors
- AdBlue tanks and level sensors
- AdBlue heaters and lines
- SCR control modules
Understanding OEMatch Adblue system
OEM (Original Equipment Manufacturer) parts are made by the same company that produced your Porsche’s original adblue system.
OE (Original Equipment) refers to parts matching original specifications for the adblue system and may be supplied by alternative manufacturers. Aftermarket parts offer alternative options, sometimes with enhanced features or better value. OEMatch supplies non-OEM adblue system items engineered as direct-fit alternatives to OEM parts, made to original-spec dimensions and tolerances for Porsche models.
AdBlue dosing takes place upstream of the SCR catalyst where the injected urea solution converts NOx into nitrogen and water vapour. The system relies on accurate fluid pressure, temperature control and injector flow alongside tank-level sensing and heater elements to prevent crystallisation. OEMatch provides parts and model-specific references to help diagnose faults and restore correct dosing and emissions control across Porsche diesel and hybrid variants.
Benefits Include
- Restores correct SCR dosing to reduce NOx emissions
- Prevents diagnostic faults and system lockouts
- Helps resist crystallisation and chemical degradation
Why Adblue system Wear and Fail
- Crystallised AdBlue deposits that clog injectors or pumps
- Sensor or heater failures within the tank assembly
- Leaking or blocked AdBlue lines and electrical faults in control units
The Importance of Replacing with OEMatch Adblue system
Timely replacement of worn AdBlue components helps maintain emissions compliance, avoids diagnostic errors and supports reliable engine operation. Using correctly specified parts reduces the risk of breakdowns and keeps the SCR system dosing accurately, which is important for regulatory checks and day-to-day performance on Porsche models.
Advantages
- Made to original-spec dimensions for consistent operation
- Compatible with factory sensors and control systems where required
- Available for key Porsche diesel and hybrid models to support targeted repairs
