Katerina Swanson
The Subaru WRX is a car that has prompted a lot of discussion about fuel filters. Some owners claim that their car doesn't have a fuel filter, while others state that their fuel filter is located inside the fuel tank. There is also conflicting information from dealerships and mechanics about the necessity and frequency of changing the fuel filter. Some sources suggest that the fuel filter is a lifetime part, while others recommend replacement every 30,000 to 72,000 miles or 5 years. It is important to note that the 'lifetime' of a filter depends on the quality of the fuel being filtered, and that a clogged fuel filter can cause problems with starting, stalling, excessive vibration, and rough slow-speed cruising.
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What You'll Learn
Fuel filter location
The location of the fuel filter in Subaru WRX models varies depending on the manufacturing year. For models manufactured between 2002 and 2004, the fuel filter is mounted on the driver's side strut tower next to the intercooler. It is a small cylinder, either black or silver, with two hoses protruding from the top. For models manufactured between 2005 and 2009, the fuel filter is located inside the fuel tank.
Some Subaru owners have expressed confusion over the location of the fuel filter and the recommended replacement intervals. Official recommendations suggest replacing the fuel filter every 72,000 miles or 72 months. However, some dealerships and service centres have stated that the fuel filter is a "lifetime" filter and does not need to be replaced unless there is an issue.
It is important to note that the process of replacing the fuel filter can be complex and time-consuming, especially if the fuel filter is located inside the fuel tank. Some Subaru owners have chosen to relocate the fuel filter from the fuel tank to the engine bay to make future replacements easier. This process involves removing the fuel filter housing and replacing it with a hose that can withstand the fuel pressure.
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Replacement intervals
There is conflicting information regarding the replacement intervals for the fuel filter of a Subaru WRX. Some sources suggest that the fuel filter should be replaced every 30,000 miles or 7,500-15,000 miles under severe driving conditions. Others claim that the fuel filter is a lifetime part that does not need to be replaced unless there is an issue. One source mentions that a fuel filter can last up to 250,000 miles without problems.
It is recommended to refer to the owner's manual for specific information regarding replacement intervals. Additionally, it is worth noting that the replacement interval can vary depending on driving conditions and fuel quality. For example, a fuel filter that filters clean fuel will last longer than one that filters dirty fuel.
Some symptoms that indicate the need for a fuel filter replacement include problems with starting the car, stalling, excessive vibration while driving, and rough slow-speed cruising. It is also important to note that replacing the fuel filter must be done carefully to avoid damaging the fuel gauge and causing inaccurate fuel level readings.
In general, it is recommended to replace the fuel filter every 5 years or 50,000 miles, but this may vary depending on the specific model and year of the Subaru WRX. For example, the maintenance schedule for the 2016 MY Subaru mentions replacing the fuel filter at 72 months or 72,000 miles.
It is always a good idea to consult with a trusted mechanic or dealership for advice on replacement intervals and to ensure that the replacement is done correctly.
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Cost of replacement
The cost of replacing a fuel filter for a Subaru WRX varies depending on the model year of the car and the type of replacement filter.
For a 2002-2004 Subaru WRX, the cost of a replacement fuel filter from ACDelco is $45.74. This is an OEM-style replacement fuel filter with a quick-connect inlet and an outside inlet diameter of 0.310 inches.
For a 2004-2007 Subaru WRX, the cost of a replacement fuel filter from DeatschWerks is $96. This is a 40-micron fuel filter that is compatible with the 2004-2007 WRX, as well as the 2004-2008 Forester and the 2002-2003 Subaru Impreza WRX.
It is worth noting that the fuel filter for the 2005-2009 model years of the WRX is located inside the fuel tank, and some sources suggest that this type of fuel filter does not need to be replaced as frequently as a traditional fuel filter. One source mentions that this type of fuel filter can last up to 150,000 miles before needing to be replaced, while another source states that it should be replaced every 30,000 miles.
The average cost nationwide to change a vehicle's fuel filter is between $90 and $207, including parts and labor. However, it is always best to consult your local service center for a more specific estimate for your particular vehicle.
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Symptoms of a clogged filter
There seems to be some confusion regarding the necessity of changing the fuel filter in Subaru WRX vehicles. While some sources suggest that the fuel filter should be replaced periodically, others claim that it is a lifetime filter that does not require replacement unless there is an issue. According to the 2016 MY Subaru maintenance schedule, the fuel filter should be replaced at either 72 months or 72,000 miles. However, some Subaru dealerships have stated that the fuel filter does not need to be replaced unless there is a problem.
Now, here are the symptoms of a clogged fuel filter:
A clogged fuel filter can cause a range of issues with your vehicle's performance and engine. Here are some common symptoms that indicate a clogged fuel filter:
- Reduced power or engine performance, especially during hard acceleration or when trying to pass someone.
- Difficulty starting the engine, including cranking issues and the engine dying out when shifting into drive.
- Engine running hotter than usual, or increased temperature at idle after driving.
- Rough idle and periodic stalling, especially when starting the car after it has been warmed up.
- "Decreased Engine Power" warning light coming on.
- Engine fuel starvation, leading to a similar effect as running lean with an insufficient fuel-to-air ratio.
It is important to note that a clogged fuel filter may exhibit some or all of these symptoms, and a thorough diagnosis is necessary to confirm the cause of the issues. Additionally, the symptoms may vary depending on the type of engine and fuel system in your vehicle.
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Potential issues with replacement
There are several potential issues with replacing the fuel filter in a Subaru WRX. Firstly, it can be challenging and expensive to replace, especially if it is located inside the fuel tank, as in some WRX models. This may require removing the fuel tank, which is a complex and costly procedure.
Secondly, there is conflicting information about the recommended replacement interval for the fuel filter. Some sources suggest replacing it every 30,000 miles or 7,500-15,000 miles under severe driving conditions, while others claim it is a lifetime filter that does not need to be replaced unless there is an issue. This confusion can make it difficult for owners to determine the appropriate replacement schedule.
Thirdly, there is a risk of damaging the fuel gauge during the replacement process, leading to inaccurate fuel level readings. This is a precise procedure that requires careful handling, and some owners have reported issues even when replaced by mechanics. Additionally, there is a risk of fuel contamination during the replacement process, which can cause performance issues and require further repairs.
Furthermore, replacing the fuel filter may not be necessary if the owner regularly uses fuel treatments and fuel system cleaners. These additives can help maintain a clean fuel system and prevent the need for frequent filter replacements. However, overusing these treatments can also be detrimental, as it may result in an over-cleaned fuel system, which can lead to other issues.
Lastly, there is a possibility of receiving incorrect or incompatible parts from dealerships or parts stores. It is crucial to verify the correct part number and compatibility with the specific WRX model and year to avoid installation issues and ensure a proper fit.
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Frequently asked questions
Your Subaru WRX likely has a fuel filter, but it may be built into the fuel pump housing and cannot be removed.
It is recommended to change your fuel filter every 5 years or 50,000 miles, but this may vary depending on your driving habits and other factors.
Yes, you may experience problems with starting your car, stalling, excessive vibration while driving, or rough slow-speed cruising.
It is possible to change the fuel filter yourself, but it must be done carefully to avoid damaging the fuel gauge and causing inaccurate fuel level readings.
You can purchase a replacement fuel filter from a Subaru dealership or online through the Subaru Genuine Parts website.
