Most diesel WAVs built from around 2015 onwards use AdBlue to meet emissions standards. It’s simple to live with, but on a converted vehicle the filler isn’t always where you’d expect.
What is AdBlue?
AdBlue is a clear, non-toxic liquid made of urea and deionised water. It’s sprayed into the exhaust, where a catalyst (an SCR system) uses it to turn harmful nitrogen oxides (NOx) into harmless nitrogen and water vapour.
What happens if it runs out?
Your dashboard warns you well in advance and usually shows the range left, just like fuel. If you ignore it and the tank empties, the engine won’t restart once you switch it off. Top up as soon can.
Where is the AdBlue filler on a WAV?
It depends on the vehicle, and the conversion may have moved it:
| Vehicle (examples) | Where the filler usually is |
|---|---|
| Peugeot Partner Tepee (BlueHDi) | Next to the diesel filler, under the fuel flap |
| VW Caddy | Under the bonnet |
| Citroën Berlingo Multispace | Inside the vehicle, partway up the lowered floor |
Your handbook shows the standard position, but if a conversion has moved it, ask the converter or the dealer you bought from. At Mobility Disabled we will always show you where it is at handover.
Topping up: tips
- Never put AdBlue in the diesel tank, or diesel in the AdBlue tank. Both cause expensive damage. Don’t start the engine if it happens; call for help.
- Buy AdBlue from fuel stations (many have pumps) or in bottles from motor shops and supermarkets. Look for the ISO 22241 standard on the label.
- Use a bottle with a built-in spout to avoid spills. Rinse any spill off paintwork with water, as it leaves white crystals.
- Store spare bottles somewhere cool and out of direct sunlight.
Questions about AdBlue?
Every WAV we sell is serviced and fluid-checked before handover. If you’re not sure where the filler is on your vehicle, call 0333 200 8593.
Related: Dashboard warning lights · Checking fluid levels · Refuelling help for disabled drivers