Fuel pressure regulators are an occasional source of frustration for the do-it-yourselfer. Sometimes, they don’t show any obvious indication of failure, leaving you puzzled when your car stumbles on acceleration. Testing a regulator can be a bit difficult as sometimes the fault won’t appear until the car has reached a certain temperature.

We have regulators in stock for both the E320 and E420 vehicles with prices ranging from $53 - $166 depending on the brand:

Purchase parts for this project HERE

Find out how to trouble-shoot with our step-by-step DIY article HERE