BMW 325i Car is getting worse gas mileage Inspection at your home or office.

Our certified mobile mechanics come to you 7 days a week between 7 AM and 9 PM.

Estimate price near me

Service Location

Customer Ratings

(441)

How A Diagnostic Works

Instantly book a certified mobile mechanic to come to you

Mechanic diagnoses the problem and quotes necessary repairs

Your vehicle is ready to go

Fair, upfront & transparent pricing for all services

Our certified mobile mechanics can come to you now.

Customer Ratings

(441)

Car is getting worse gas mileage Inspection Service

How much does a Car is getting worse gas mileage Inspection cost?

On average, the cost for a BMW 325i Car is getting worse gas mileage Inspection is $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

CarServiceEstimateShop/Dealer Price
1990 BMW 325iL6-2.5LService typeCar is getting worse gas mileage InspectionEstimate$114.99Shop/Dealer Price$132.49 - $145.62
1992 BMW 325iL6-2.5LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
2005 BMW 325iL6-2.5LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
1993 BMW 325iL6-2.5LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$112.48 - $125.60
1987 BMW 325iL6-2.5LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$112.55 - $125.72
2002 BMW 325iL6-2.5LService typeCar is getting worse gas mileage InspectionEstimate$94.99Shop/Dealer Price$112.52 - $125.67
1991 BMW 325iL6-2.5LService typeCar is getting worse gas mileage InspectionEstimate$99.99Shop/Dealer Price$117.28 - $130.25
2001 BMW 325iL6-2.5LService typeCar is getting worse gas mileage InspectionEstimate$99.99Shop/Dealer Price$117.94 - $131.39
Show example BMW 325i Car is getting worse gas mileage Inspection prices

Poor gas mileage, especially a sudden drop in fuel efficiency, can be blamed on a number of issues. It can also be an indicator of a much more serious issue that if left un-repaired, can develop into an expensive repair.

There are dozens of problems that can lead to a drop in gas mileage, some of them are serious and some can be easily corrected. Here are some of the more common issues that can affect the fuel efficiency of most cars.

How this system works:

The fuel system stores and supplies fuel to the car to help drive the engine. Fuel is mixed with air, atomized and vaporized in the engine intake system. It is then compressed in the engine cylinder and ignited which produces energy to move the pistons. There are different engine layouts and designs but most of them work in the same basic way.

When the system is working as designed, and under certain conditions, maximum fuel efficiency will be achieved. Numerous factors can have an affect on fuel efficiency so it is usually a constantly changing number but a serious and sudden drop in miles per gallon is cause for concern and the vehicle should be inspected.

Common reasons for this to happen:

  • Dirty Oxygen Sensor: An oxygen sensor measures exactly how rich or lean the exhaust gases are when they leave the combustion chamber. The data is used by the vehicle computer to adjust the amount of fuel entering the engine. If the sensor is dirty or failing it can lead to a drop in miles per gallon. It can also lead to failed emission tests and a rough idle.

  • Dirty Fuel Injectors: Fuel injectors spray fuel into the cylinders where it is mixed with air and ignited. Over time the fuel injector system can become clogged. This can lead to a drop in fuel efficiency as well as slow acceleration and the car not having enough power. If caught early, simply cleaning the injectors can solve the problem. As it progresses, the injectors may have to be replaced.

  • Bad or Dirty Spark Plugs: Spark plugs ignite the fuel in the combustion chamber. If they are dirty or working incorrectly, it can cause the engine to misfire, leading to poor engine performance. This can lead to a lack of power as well as a big decline in fuel efficiency.

  • Malfunctioning Mass Airflow Sensor: A mass airflow sensor detects the amount of air coming into the fuel injection system. It delivers that information to the vehicle's computer, which crunches the numbers and then delivers the proper amount of fuel to the air in the vehicle. A dirty airflow sensor will degrade fuel efficiently and lead to a rough idle and even stalling as the problem progresses.

  • Misaligned Tires: Tires that are low or out of alignment can lead to a drop in fuel efficiency. Checking the tire pressure and have the alignment checked on regular basis can help prevent this problem.

  • Defective Fuel Pump: Fuel delivery issues can drastically affect fuel efficiency. The fuel pump pulls fuel from the gas tank to the fuel injectors. The fuel pump can become clogged or malfunction. A bad fuel pump can lead to a rough running engine because it is not getting enough fuel. This will lead to a decline in gas mileage. If this issue is not addressed it will lead to a rough, idle, sputtering and stalling.

  • Clogged Fuel Filter: A clogged fuel filter will also cause problems with gas mileage. The fuel filter screens out contaminants in the fuel, and over time it will become clogged. Fuel filters need to be replaced periodically.

  • Stuck Brake Caliper: A stuck caliper on a disc brake or a stuck shoe on a drum brake can lead to a serious decline in gas mileage. In addition, any brake issue can make the vehicle dangerous to drive. If the decline in efficiency is accompanied by the vehicle pulling to one side, the brake system should be inspected immediately.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine the source and cause of the poor gas mileage issue and will then provide a detailed inspection report that includes the scope and cost of the necessary repairs.

How it's done:

A mechanic will inspect your fuel injectors, spark plugs, airflow sensor, tires and other important components to reach an accurate diagnosis. It may be necessary for the mechanic to test drive the car to produce acceptable results and pinpoint the source of the problem.

How important is this service?

A few of these issues are easy to fix but others are an indicator of a much more serious problem. Issues related to the fuel system will eventually lead to a rough running engine, stalling, and a car that won’t start at all.

Fast and easy service at your home or office

Backed by 12-month, 12.000-mile guarantee


Meet some of our expert BMW mechanics

Real customer reviews from BMW owners like you.

Excellent Rating

(441)

Rating Summary
419
13
4
3
2
419
13
4
3
2

Cary

27 years of experience
92 reviews
Cary
27 years of experience
BMW 325i L6-2.5L - Ambient Temperature Sensor (Switch) - Raleigh, North Carolina
Very professional...courteous....knowledgeable and kind

Chris

16 years of experience
419 reviews
Chris
16 years of experience
BMW 325i L6-2.5L - Brake Pads Replacement (Front, Rear) - San Francisco, California
Chris was very professional and experience. He inspect the vehicle and recommended the needed services for our vehicle which l truly appreciated. Chris do not cut corners and with his extensive knowledge on car repairs, l truly felt our car is in good hands! I highly recommend Chris for his work and will surely call on him for any future work! Thank you Chris!

Chuck

10 years of experience
347 reviews
Chuck
10 years of experience
BMW 325i L6-2.5L - Air Pump - Dallas, Texas
Extremely kind, knowledgeable, and get the job done efficiently. Lucky to have him as my first mobile mechanic. Would definitely recommend.

TJ

26 years of experience
362 reviews
TJ
26 years of experience
BMW 325i L6-2.5L - Check Engine Light is on - Cape Coral, Florida
He is a very nice Friendly person, showed up on time.

Excellent Rating

(441)

Rating Summary
419
13
4
3
2
419
13
4
3
2
Number of BMW 325i services completed
4851+
services done by our mechanics
TOTAL NUMBER OF EXPERT BMW MECHANICS
1100+
experts on our platform

Recent articles & questions

How Long Does a Brake Light Switch Last?
The The brake lights on a vehicle will help the motorist around you to be aware of when you are trying to bring your car to a stop. With all of the different parts on a car that contribute to...
How Long Does a Vent Oil Separator Last?
The The engine in your car can only run when the right number of controlled explosions are performed. During the explosions, there are a number of gases that are produced that will then be filtered out of the engine. The...
How to Get a West Virginia Driver's Permit
West West Virginia uses a graduated license program that requires all new drivers under 18 to begin driving with a learner’s license, in order to practice safe driving under supervision before getting their full driver’s license. To receive the initial...

OBD-II failed for smog check

Unfortunately without more information as to why your Toyota Corolla did not pass the emissions test, it is difficult to determine the cause for the failed smog check. Provided that the ODB2 port itself has power and is allowing the...

Trying to locate the fuel pressure regulator??

The fuel pressure regulator is almost always located on the fuel rail. The fuel rail is located on the top of the engine and has the fuel injectors under it. This will be located right around where the intake manifold...

advancetrac and abs light on after cv axle replacement

This may be related to faulty wheel speed sensors which are located at each of the four wheels. These sensors monitor wheel speed which is relayed to the ABS system. When the ABS system detects an abnormal speed for the...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com