Replacing Fuel Filter In Subaru Impreza: Step-By-Step Guide

Replacing the fuel filter on a Subaru Impreza can be a tricky task. While some owners claim that it is not necessary to replace the fuel filter unless there is an issue, others suggest that not doing so can lead to problems with the injectors. The fuel filter is located inside the gas tank, and according to the manual, it should be replaced every 72,000 miles. However, a local Subaru dealership has contradicted this, stating that it is a lifetime filter. This task should be carefully conducted to avoid damaging the fuel gauge and causing inaccurate fuel level readings.

Location of the fuel filter

The location of the fuel filter in a Subaru Impreza depends on the model year of the car. For a 2017 Subaru Impreza, the fuel filter is located inside the gas tank. It is accessible via the rear passenger compartment, underneath the rear seat. The seat can be removed by popping it out from the rear via two clips.

For older Subaru Imprezas, the fuel filter is located in the engine bay, by the front driver's side strut.

Some Subaru Imprezas also have a fuel strainer, which is accessible from underneath the rear bench seat.

Fuel filter replacement frequency

The frequency with which you should replace the fuel filter on a Subaru Impreza depends on a variety of factors, including the age of the car, the quality of the fuel being used, and the maintenance of the fuel system.

Some owners' manuals for the Subaru Impreza state that the fuel filter should be replaced every 72,000 miles or 72 months. However, some dealership staff and mechanics have claimed that the fuel filter is a "lifetime" filter and does not need to be replaced unless there is an issue. They claim that modern fuel is cleaner and that most gas stations have filters, so there is less contamination in the fuel. Additionally, some have suggested that the cost of regularly replacing the fuel filter may outweigh the benefits, as a clogged filter does not stop filtering and can even improve its filtering ability as the particles blocking it help to filter out more particles.

However, others have argued that a filter is doing its job of filtering out impurities, and eventually, it will need to be replaced. They suggest that waiting until there is an issue is not a good idea, as you will then need to tow your car. Additionally, one owner's manual states that cleaning agents should never be added to the fuel tank as they may damage the fuel system.

Some owners have reported that their dealers have told them that the fuel filter is only accessible by dropping the fuel tank, which is a lot of work and expensive. However, others have said that there is an access panel under the rear seat, and the filter can be accessed and replaced from there.

Overall, it seems that there is no definitive answer on the replacement frequency of the fuel filter on a Subaru Impreza. Some owners choose to replace it preemptively, while others wait until there is an issue or rely on the advice of their dealer or mechanic.

Fuel filter replacement cost

The fuel filter in your car plays a crucial role in keeping your engine healthy. It does this by removing contaminants and impurities such as rust and dirt from the fuel before it reaches the engine. This small but essential component is usually located between the fuel tank and the engine and can be made of paper, mesh, or synthetic fibres.

While fuel filters are not typically considered a maintenance item, they may need to be replaced if they become clogged, which can cause engine performance issues. The cost of replacing a fuel filter can vary depending on several factors, including the type of car you have and the labour costs in your area. That being said, replacing a fuel filter is generally considered an affordable repair, with average costs ranging from $70 to $150. Some sources give a higher estimate of between $90 and $142, including parts and labour.

It's worth noting that some car manufacturers recommend changing the fuel filter every 5 years or 50,000 miles as part of routine maintenance. However, this may differ depending on factors such as your driving habits and the conditions in which you drive. Additionally, it's important to be cautious when choosing a mechanic to replace your fuel filter, as some Subaru owners have reported issues with inaccurate fuel level readings after the service.

In terms of the process of replacing a fuel filter, it typically involves relieving the pressure in the fuel system, removing the old filter, using a pan or bucket to catch residual fuel, and installing the new filter while ensuring a good seal between the fuel lines and the filter. While it may be tempting to attempt this repair yourself, it can be complicated and may require specific tools, so it's generally recommended to consult an expert.

Fuel filter replacement risks

Fuel filter replacement can be a risky task, and the risks can vary depending on the car model and the expertise of the person performing the replacement. Here are some potential risks to consider when replacing the fuel filter on a Subaru Impreza:

• Damage to the fuel gauge: One of the risks mentioned by several Impreza owners is the potential damage to the fuel gauge during the replacement process. The plastic float that reads the fuel level is integrated into the fuel pump, and improper handling can lead to inaccurate fuel level readings.
• Leaking fuel: There is a risk of fuel leakage, which can occur if the connections to the fuel filter are not properly secured. This can result in fuel spraying out and creating a hazardous situation.
• Inaccurate fuel level readings: In addition to potential damage to the fuel gauge, improper replacement of the fuel filter can also result in inaccurate fuel level readings. This can be caused by issues with the fuel gauge or other components in the fuel system.
• Cost of replacement: Replacing the fuel filter on a Subaru Impreza can be expensive, with labour costs ranging from $140 to $250, depending on the model and location. The parts themselves are relatively inexpensive, typically costing around $15. However, accessing the fuel filter may require additional work, such as removing the rear seat or dropping the fuel tank, which can increase the overall cost of the replacement.
• Difficulty of the task: Replacing the fuel filter on a Subaru Impreza can be a challenging task, especially for those without mechanical expertise. It may require raising the vehicle, depressurising the fuel system, and carefully removing and installing the fuel filter without causing damage to surrounding components.
• Inconsistent information: There is conflicting information regarding the recommended replacement interval for the fuel filter. While some sources suggest replacement every 72,000 miles, others claim that it is a "lifetime" filter that never needs to be replaced. This inconsistency can lead to confusion and uncertainty among Impreza owners.
• Potential for error: As with any mechanical task, there is always a risk of human error during the replacement process. This could result in improper installation, damage to other components, or failure to address the underlying issue.
• Fuel contamination: If foreign fluids, bad fuel, or water has entered the fuel system, it is crucial to replace the fuel filter. Driving with contaminated fuel can cause serious damage to the engine and fuel system.
• Engine damage: Driving with a faulty fuel filter can potentially lead to engine damage. A clogged fuel filter can restrict fuel flow, resulting in poor engine performance and, in extreme cases, disintegration of the filter, allowing trapped contaminants to reach the fuel injectors and causing additional problems.
• Safety hazards: Working with fuel systems always carries inherent safety risks. It is crucial to take appropriate safety precautions, such as ensuring proper ventilation and avoiding open flames or sparks, to mitigate the risk of fire or explosion.

Fuel filter alternatives

When it comes to replacing the fuel filter in your Subaru Impreza, there are several alternatives to consider. While the OEM fuel filter is always an option, there are also aftermarket fuel filters available that can provide the same functionality at a more affordable cost. Here are some of the alternatives you can explore:

• ACDelco Gold (Professional) Fuel Filters: These fuel filters are designed as high-quality alternatives to Original Equipment (OE) parts. They are located in the fuel line of your vehicle and help prevent contaminants such as dirt and rust from entering the fuel delivery system. ACDelco Gold parts offer a precise fit, form, and function, making them suitable for General Motors vehicles and most other makes and models.
• Purolator Fuel Filters: Purolator offers a range of fuel filters that help protect fuel pumps and fuel injectors by removing water, dirt, rust, and other contaminants from the fuel system. Their filters are designed to meet or exceed OE specifications and are recommended to be replaced annually for peak performance. Purolator fuel filters ensure smooth and efficient engine performance while preventing rust and corrosion.
• Carquest Premium Fuel Filters: Carquest provides high-efficiency fuel filters for various applications, including automotive, trucks, farm, construction, and mining equipment. Their fuel filters are designed to meet or exceed Original Equipment specifications, providing maximum fuel system protection. Carquest fuel filters are manufactured to strict quality standards, ensuring 98% efficiency at a 10-micron rating. They help keep the injectors free from debris and clogging while providing unrestricted fuel flow.
• GM Genuine Parts Fuel Filter: This fuel filter is designed by GM Engineers specifically for Chevrolet, Buick, GMC, or Cadillac vehicles. It helps prevent dirt, rust, and other contaminants from entering the fuel delivery system. GM regularly updates its service part designs to integrate new materials and technologies, ensuring the highest quality standards.

These are just a few examples of alternative fuel filters available for your Subaru Impreza. It is important to consult a qualified mechanic or refer to the manufacturer's recommendations before making a purchase decision. Additionally, always ensure that the fuel filter you choose meets the specifications of your specific vehicle model and year.

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