Ameer Randolph
The fuel filter in a Subaru WRX STi is located in different places depending on the model year. For example, for the 2008-2014 models, the fuel filter is located in the fuel pump assembly, which is under the rear seat cushion. For the 2004 models, the fuel filter is located in the gas tank, and for the earlier models, it is in the engine bay next to the shock tower. It is important to keep the fuel filter clean as a dirty filter can cause costly engine repairs.
| Characteristics | Values |
|---|---|
| Fuel filter location | Under the rear seat cushion |
| Fuel filter type | In-tank filter, also referred to as a "sock" |
| Fuel filter replacement | Recommended by some sources every 60,000 miles or 15,000 miles |
| Fuel filter cost | Around $80-90 for the filter alone |
| Fuel pump assembly cost | $500+ |
| Fuel filter replacement process | Involves removing the rear seat cushion, accessing the fuel pump assembly, and disconnecting electrical connections |
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What You'll Learn
The fuel filter location depends on the year of manufacture
In contrast, older vehicles tend to have fuel filters that are more easily accessible and do not require removing the rear seat cushion to access. For example, the fuel filter in a 2017 Subaru WRX STi is located in a different position to the 2009-2014 models, as the OEM fuel filter location is different.
The location of the fuel filter can vary depending on the vehicle and its age. Newer vehicles often have advanced fuel systems with integrated fuel filters designed to last the vehicle's lifetime. These fuel filters are often located within the fuel tank or as part of the fuel pump assembly. Older vehicles may have fuel filters located on the vehicle frame outside the tank or inside the fuel tank.
It is important to note that the fuel filter location is not just dependent on the year of manufacture but also on the vehicle's model and make. Different manufacturers may have different locations for their fuel filters, even for vehicles of similar ages. Therefore, it is always recommended to refer to the vehicle's owner's manual or seek advice from a qualified mechanic to locate the fuel filter accurately.
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The filter is located in the fuel pump assembly
The fuel filter is an essential component of your car's fuel system, ensuring the fuel entering the engine is clean and free of contaminants. For some Subaru models, including the 2008-2014 WRX STi, the fuel filter is located within the fuel pump assembly, making it a bit more involved to access and replace compared to standalone fuel filters.
To access the fuel pump assembly and the integrated fuel filter on these Subaru models, you'll need to start by removing the rear seat cushion. Reach under each side of the cushion to find the pull tabs. Pull these tabs towards the front of the vehicle to release the sides of the cushion. Then, go to the front center of the cushion and pull it upwards to remove it completely. Underneath the cushion, you'll find a metal panel. The fuel pump assembly is located on the passenger side under this panel.
Once you've accessed the fuel pump assembly, you'll find that the fuel filter is situated behind the fuel pump. The pump is held in place by a couple of clips, which you can carefully remove to access the filter. It's important to note that working with gasoline can be dangerous, so it's recommended to perform this job outdoors with proper ventilation.
Some Subaru models from 2004 and earlier had the fuel filter located in the engine bay next to the shock tower. However, starting from mid-2004, Subaru transitioned to placing the fuel filter within the fuel tank, integrated with the fuel pump assembly. This design change was likely made to streamline the process of replacing the filter and pump for mechanics and dealers. While it may be more challenging for DIY enthusiasts to access and replace the fuel filter in this configuration, it's still possible to order just the filter for a more cost-effective solution.
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It's under the rear seat cushion
If you're looking for the fuel filter in your STi, it's under the rear seat cushion. This is the case for the 2008-2014 models, and it's a bit of a tricky process to access it.
First, you need to remove the rear seat cushion. This is done by reaching under each side of the cushion to find the pull tabs. Pull these towards the front of the vehicle, and this will release the sides of the cushion. Then, go to the front center of the cushion and pull it upwards to remove it.
Underneath, you'll see a metal panel. On the passenger side, there is the fuel pump assembly, which is where the fuel filter is located. To access the fuel pump and filter, you'll need to carefully remove the bottom of the canister. There are four tabs around the canister that need to be pried up, and then you can slide the canister section down. As you do this, disconnect the electrical connection for the fuel level float. With these connections disconnected, the two parts will slide apart, and you can set the bottom aside.
Now, you have access to the fuel pump and filter. The fuel pump is held in place by two clips, and the filter is behind it.
It's important to note that some sources suggest that the fuel filter in the STi models is a "lifetime" filter, and it's not necessary to change it unless there is a major problem. However, others recommend changing it every 60,000 miles or so, especially if you're experiencing issues like a misfire or struggling under load, which could indicate a clogged fuel filter.
When working with gasoline, always ensure you're in a well-ventilated area and take the necessary safety precautions.
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Disconnect the electrical connection for the fuel level float
To disconnect the electrical connection for the fuel level float, you must first access the fuel pump assembly. In the case of a '09-'14 STi, this is located under the rear seat cushion. To remove the rear seat cushion, reach under each side of the cushion to find the pull tabs. Pull these towards the front of the vehicle, allowing you to release the sides of the cushion. Once the sides are released, go to the front centre of the cushion and pull it out. This will reveal the metal underneath, and the fuel pump assembly will be on the passenger side.
Now, to access the fuel pump and filter, you must remove the bottom of the canister. There are four tabs around the canister that hold it together. Carefully pry these tabs up, and slide the canister section down. As the canister slides down, you will be able to disconnect the electrical connection for the fuel level float.
It is important to note that when working with anything fuel-related, you should always have a fire extinguisher nearby and avoid working near anything that can cause a spark. Safety glasses and gloves are also recommended.
Additionally, as you will be working with gasoline, it is recommended that this job is done outside with proper ventilation. It should not be done during the winter, in an enclosed garage, with the heater running.
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The filter is behind the pump
The fuel filter on a 2008-2014 STi is located behind the pump. To access it, you'll need to remove the rear seat cushion. Once the cushion is removed, you'll see a metal panel underneath. This is where the fuel pump assembly is located. The fuel pump assembly consists of the pump itself and the filter.
To access the fuel pump and filter, you'll need to remove the bottom of the canister. There are four tabs around the canister that hold it in place. Carefully pry these tabs up and slide the canister section down. As you do this, disconnect the electrical connection for the fuel level float. With all the tabs and electrical connections disconnected, the two parts should slide apart.
Now you're just dealing with the top section, which contains the fuel pump and filter. The fuel pump is held in place by two clips on the top. The filter is located behind the pump. It's important to note that there is also a sock that hangs off the bottom of the pump, but this is not the filter. The actual filter is a white plastic assembly that the pump clips into.
Some people choose to bypass the in-tank filter and add a filter in the engine compartment instead. This can be done by running a fuel line from one fitting to another once the filter is removed. However, the in-tank filter serves an important purpose: it keeps debris from damaging the pump.
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Frequently asked questions
The fuel filter is located in the fuel tank.
The 2005 STi's fuel filter is located in the fuel tank, attached to the pump.
The fuel filter is located behind the fuel pump, which is accessed by removing the bottom of the canister.
The fuel filter is located in the gas tank, unless it is one of the first 2004 models, in which case it is in the engine bay next to the shock tower.
The fuel filter on a Honda is located in the fuel tank.
