OE Quality
60-Day Returns

Denso 143-3198 Air Filter
Overview of the Denso FTF Air Filter 143-3198
The Denso FTF Air Filter 143-3198 is designed to provide reliable engine air filtration for select Subaru models. Engineered with precise dimensions and a rectangular shape, this air filter supports optimal airflow and engine performance for vehicles like the Subaru Forester, Outback, and Impreza.
- Compatible with Subaru Baja, Forester, Impreza, Legacy, and Outback
- Rectangular shape with dimensions: 372 mm x 167 mm x 34 mm (Height)
- Part number 143-3198 for accurate replacement
- Engine air filter designed to maintain clean airflow to the engine
- Part of the Denso FTF Air Filter product line
Detailed Product Description and Attributes
This Denso engine air filter features a rectangular design measuring 372 mm in length (Side A), 167 mm in width (Side B), and 34 mm in height. These dimensions ensure a precise fit within the air intake system of compatible Subaru vehicles. The rectangular shape supports efficient filtration by maximizing the surface area exposed to incoming air, which helps maintain engine efficiency and longevity. The part number 143-3198 identifies this specific filter within Denso's catalog, ensuring compatibility and ease of ordering.
About the Denso FTF Air Filter Product Line
The FTF Air Filter line from Denso focuses on providing factory-type filtration solutions that meet original equipment specifications. Filters in this line, including the 143-3198, are designed to deliver consistent filtration performance and fitment for specific vehicle applications. This product line emphasizes maintaining engine protection by filtering out contaminants while supporting proper airflow.
Applications and Common Issues Addressed
- Compatible with Subaru Baja, Forester, Impreza, Legacy, and Outback models requiring a rectangular engine air filter
- Helps prevent engine damage caused by dust and debris entering the intake system
- Reduces the risk of decreased engine performance due to clogged or inefficient filters
- Supports fuel efficiency by maintaining clean air supply to the engine
- Addresses issues related to rough idling or engine hesitation caused by poor air filtration
Installation Notes and Tips
- Ensure the air filter housing is clean before installing the new filter
- Verify the orientation of the rectangular filter matches the housing design
- Check for proper sealing to prevent unfiltered air bypass
- Replace the filter according to the vehicle manufacturer’s recommended maintenance schedule
Quality Assurance and Warranty
Denso manufactures the FTF Air Filter 143-3198 to meet strict quality standards consistent with original equipment requirements. While specific warranty details may vary, Denso products typically come with a limited warranty covering defects in materials and workmanship. Using this filter helps maintain the integrity of your Subaru’s engine air intake system.
| Brand | Denso |
| Part Number | 143-3198 |
| Position | FTF Air Filter |
| Height | 34.0 |
| Shape | RECTANGULAR |
| Side A Length | 372.0 |
| Side B Length | 167.0 |
This part fits 26 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2006 | Subaru | Baja | N/A | FTF Air Filter |
| 2005 | Subaru | Baja | N/A | FTF Air Filter |
| 2004 | Subaru | Baja | N/A | FTF Air Filter |
| 2004 | Subaru | Forester | N/A | FTF Air Filter |
| 2004 | Subaru | Impreza | N/A | FTF Air Filter |
| 2004 | Subaru | Legacy | N/A | Exceptional fitment for vehicles in California.; FTF Air Filter |
| 2004 | Subaru | Outback | N/A | Exceptional fitment for vehicles in California.; FTF Air Filter |
| 2003 | Subaru | Baja | N/A | FTF Air Filter |
| 2003 | Subaru | Forester | N/A | FTF Air Filter |
| 2003 | Subaru | Impreza | N/A | FTF Air Filter |
| 2003 | Subaru | Legacy | N/A | FTF Air Filter |
| 2003 | Subaru | Outback | N/A | FTF Air Filter |
| 2002 | Subaru | Forester | N/A | FTF Air Filter |
| 2002 | Subaru | Impreza | N/A | FTF Air Filter |
| 2002 | Subaru | Legacy | N/A | FTF Air Filter |
| 2002 | Subaru | Outback | N/A | FTF Air Filter |
| 2001 | Subaru | Forester | N/A | FTF Air Filter |
| 2001 | Subaru | Impreza | N/A | FTF Air Filter |
| 2001 | Subaru | Legacy | N/A | FTF Air Filter |
| 2001 | Subaru | Outback | N/A | FTF Air Filter |
| 2000 | Subaru | Forester | N/A | FTF Air Filter |
| 2000 | Subaru | Impreza | N/A | FTF Air Filter |
| 2000 | Subaru | Legacy | N/A | FTF Air Filter |
| 2000 | Subaru | Outback | N/A | FTF Air Filter |
| 1999 | Subaru | Impreza | N/A | Calif; FTF Air Filter |
| 1999 | Subaru | Legacy | N/A | Calif, OE# 16546 AA07A; FTF Air Filter |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.