Keep your diesel's after-treatment system dosing in cold weather with the Standard Ignition Diesel Exhaust Fluid (DEF) Heater EFH205. It installs as a direct-fit replacement for the listed applications: the 2013-2015 Porsche Cayenne and the 2012-2016 Volkswagen Touareg.
Diesel exhaust fluid is a urea-and-water solution that thickens and can freeze in low temperatures. This DEF heater warms the fluid in the DEF system so it stays fluid and the selective catalytic reduction (SCR) system can meter it into the exhaust stream as intended.
Signs this part may need replacing: a DEF-system or SCR warning light, DEF heater fault codes, or difficulty keeping DEF unfrozen in cold weather. These symptoms can have other causes, so diagnose the fault before replacing.
Interchange: Manufacturer part number EFH205.
What does this DEF heater do?
It warms the diesel exhaust fluid in the DEF system so the urea-water solution stays fluid in cold weather and the SCR system can meter it into the exhaust.
Which vehicles does the EFH205 fit?
It's a direct-fit replacement for the 2013-2015 Porsche Cayenne and the 2012-2016 Volkswagen Touareg. Confirm your vehicle in the Buyer's Guide tab.
Why does diesel exhaust fluid need to be heated?
DEF is a urea-and-water solution that thickens and can freeze at low temperatures. Heating keeps it fluid so the after-treatment system can dose it as intended.
What are signs this DEF heater may need replacing?
A DEF-system or SCR warning light, DEF heater fault codes, or trouble keeping DEF unfrozen in the cold. These signs can have other causes, so diagnose first.
What is the manufacturer part number?
The manufacturer part number is EFH205 from Standard Ignition.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
