Mercedes-Benz S420 Fuel Pressure Regulator Replacement at your home or office.

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Fuel Pressure Regulator Replacement Service

How much does a Fuel Pressure Regulator Replacement cost?

On average, the cost for a Mercedes-Benz S420 Fuel Pressure Regulator Replacement is $210 with $115 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1995 Mercedes-Benz S420V8-4.2LService typeFuel Pressure Regulator ReplacementEstimate$345.35Shop/Dealer Price$420.44 - $606.34
1999 Mercedes-Benz S420V8-4.2LService typeFuel Pressure Regulator ReplacementEstimate$325.35Shop/Dealer Price$400.47 - $586.39
1998 Mercedes-Benz S420V8-4.2LService typeFuel Pressure Regulator ReplacementEstimate$325.35Shop/Dealer Price$400.47 - $586.39
1994 Mercedes-Benz S420V8-4.2LService typeFuel Pressure Regulator ReplacementEstimate$325.35Shop/Dealer Price$400.43 - $586.32
1997 Mercedes-Benz S420V8-4.2LService typeFuel Pressure Regulator ReplacementEstimate$325.35Shop/Dealer Price$400.50 - $586.44
1996 Mercedes-Benz S420V8-4.2LService typeFuel Pressure Regulator ReplacementEstimate$325.35Shop/Dealer Price$400.47 - $586.39
Show example Mercedes-Benz S420 Fuel Pressure Regulator Replacement prices

What is the Fuel Pressure Regulator all about?

Cars need to run at a specific fuel pressure. The regulator controls the fuel pressure and returns any excess fuel to the tank. The regulator is important to ensure that the injectors operate properly. If the regulator malfunctions, it can cause the engine to flood. In extreme cases, a flooded engine can be a fire hazard.

You may see liquid on the floor near the exhaust pipe (raw gas dripping from the tail pipe). You may also notice black smoke when the engine is running (partially burnt gas produces black smoke). Not only will the car get poor gas mileage, it also may not pass an emissions test.

Fuel Pressure Regulator-MATROX-1

Keep in mind:

Some fuel regulators are located in the tank as part of the fuel pump assembly. If the fuel pressure regulator has gone bad, it can leak fuel in the engine, contaminating the engine oil.

How it's done:

  • Scan the computer system in the car for trouble codes.
  • Inspect fuel pressure regulator for leakage and proper operation.
  • Inspect for any broken vacuum lines.
  • Remove and replace fuel pressure regulator if it is bad.
  • Change the engine oil and filter if the oil is found to be contaminated.
  • Clear any diagnostic trouble codes.
  • Test drive the vehicle.

Our recommendation:

Any time that you notice something potentially wrong with your fuel system, you should schedule an inspection. There are many signs that a fuel pressure regulator is malfunctioning, and all should be taken seriously. If you notice that your car is getting poor mileage, has gas leaking, has black smog coming out of the exhaust, or isn’t running smoothly, contact a mechanic. A malfunctioning fuel pressure regulator will often illuminate the Check Engine warning light, which is always a sign to schedule an inspection.

What common symptoms indicate you may need to replace the Fuel Pressure Regulator?

  • Poor gas mileage.
  • Smell of gas in the engine compartment.
  • Fuel is leaking.
  • Black smoke coming out of the exhaust (tail pipe).
  • Failed emissions test.
  • Check engine light is on.

How important is this service?

When gas is sent from your gas tank to your engine, the fuel pressure regulator makes sure that the fuel pressure is optimal. The fuel pressure regulator is responsible for returning excess fuel to the gas tank, and making sure that the fuel injectors get the perfect fuel pressure. When the regulator malfunctions, the fuel pressure will not be controlled, and your engine will not run optimally. Your engine will also be at risk for fuel flooding, which can result in serious damage and even fire.

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Excellent Rating

(13)

Rating Summary
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ALAA

37 years of experience
56 reviews
ALAA
37 years of experience
Mercedes-Benz S420 V8-4.2L - Thermostat - Sacramento, California
punctual and communicative. Works with you when things go wrong. would recommend.

Tien

23 years of experience
903 reviews
Tien
23 years of experience
Mercedes-Benz S420 V8-4.2L - Water Pump - Moraga, California

Jamie

22 years of experience
91 reviews
Jamie
22 years of experience
Mercedes-Benz S420 V8-4.2L - Serpentine/Drive Belt Replacement - Ontario, California
Great job

Richard

17 years of experience
141 reviews
Richard
17 years of experience
Mercedes-Benz S420 V8-4.2L - Fan Clutch - Sacramento, California
good guy does the job and easy to talk to very friendly!

Excellent Rating

(13)

Rating Summary
12
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12
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Number of Mercedes-Benz S420 services completed
143+
services done by our mechanics
TOTAL NUMBER OF EXPERT Mercedes-Benz MECHANICS
1100+
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