Priced as of May 27, 2026
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CarCareTruth's Analysis
Last reviewed May 27, 2026
TL;DR A disposable three-layer pleated replacement filter for Subaru EJ-series and EZ36D H6 platforms (2005–2015 Legacy, Outback, Forester, Impreza, and the 2015 WRX and STI only). OEM cross-reference is verified across four independent parts databases; Denso has not published ISO 5011 or SAE J726 test data for this SKU, so efficiency claims remain unverified. Fitment is confirmed by community across multiple Subaru applications; one dissenting review on a 2012 Forester raises a dimension question that the majority of reviewers have not corroborated.
What it is and how it performs
The Denso 143-3199 is a disposable pleated paper/synthetic multi-layer engine air filter for the Subaru EJ-series boxer four-cylinder and EZ36D H6 platforms spanning the 2005–2015 model years. Denso supplies OEM filtration components to multiple automakers, and the 143-3199 cross-references directly to four Subaru OEM part numbers (16546AA090, 16546AA10A, 16546AA120, 16546AA12A) confirmed across RockAuto, newparts.com, and airfilter-crossreference.com. The manufacturer claims three-layer filtration media with higher efficiency, but no ISO 5011 or SAE J726 test standard has been published for this SKU — the efficiency claim is unverified. Community reviews across 34 verified purchases confirm standard OEM-interval replacement at 12,000–15,000 miles with no documented premature clogging. Amazon's Choice placement for the Subaru application and a 4.3-star rating reflect consistent fitment satisfaction in the majority of community reports.
Who should buy this — and who should skip it
Right pick for 2005–2015 Subaru Legacy, Outback, Forester, Impreza, XV Crosstrek, or Tribeca owners wanting an OEM-supplier disposable filter at competitive pricing versus the dealership. Skip if your Subaru is a 2016 or newer model — the FB-series engines in the 2016+ generation use a different air box, and the 143-3199 does not fit. WRX and WRX STI owners: confirmed fitment is limited to the 2015 model year only; pre-2015 and post-2015 WRX use different air box housings requiring a different part number. Buyers of a 2012 Forester who need exact OEM-dimension parity may prefer the Subaru dealer part given the one unresolved dimension report.
Safety and environmental impact
Passive replacement component — no chemical exposure pathway during installation or removal; no SDS applies. Environment score of 4.6 reflects the disposable lifecycle: a single filter is replaced every 12,000–15,000 miles, generating physical solid waste at each interval; composite paper/cardboard/foam construction has limited municipal recyclability with no manufacturer take-back program. The OEM-interval service life meets the rubric score-6 anchor with no documented premature failure.
Frequently asked questions
Does the Denso 143-3199 fit the 2015 WRX and WRX STI?▾
Yes, but only the 2015 model year. The 2015 WRX and WRX STI use the EJ257 engine with the same air box as the EJ-series Subaru lineup. Pre-2015 WRX and STI (GR/GV chassis) use a different air box and require a different part number. 2016+ WRX and STI (VA chassis, FA20DIT engine) also require a different filter. Always verify with your specific year before purchasing.
Does this filter fit 2016 and newer Subaru models?▾
No. The 143-3199 is designed for EJ-series and EZ36D engine platforms used through 2015. The 2016+ Subaru lineup shifted to FB-series engines (FB20, FB25) and the FA20 boxer four-cylinder, which use a different air box design. The 143-3199 does not fit 2016+ Legacy, Outback, Forester, or Impreza.
One reviewer said the 143-3199 has smaller dimensions than the OEM Denso filter — is that a problem?▾
One verified-purchase reviewer (2012 Forester) reported the 143-3199 dimensions are smaller than the OEM Denso filter with a thinner gasket. This finding has not been corroborated by other reviewers across the 34-review sample, including multiple positive 2013 and 2015 Outback reports. The discrepancy may reflect a difference between the Denso First Time Fit aftermarket SKU and the Denso-supplied Subaru dealer part. Buyers with 2012 Foresters who need exact OEM-dimension parity may prefer the dealer part.
What is the replacement interval for the Denso 143-3199?▾
Subaru's OEM service schedule specifies 12,000–15,000 miles for the EJ-series platforms this filter covers. No community reports of premature clogging were found in the 34-review sample. Dusty or severe-duty driving conditions warrant the shorter end of the interval.
From the manufacturer
Marketing copy from Denso, via Amazon. Not editorial.
- •Denso Air Filter - 143-3199
- •Item Package Dimension: 9.376L x 9.09W x 1.61H inches
- •Item Package Weight - 0.5 Pounds
- •Item Package Quantity - 1
- •Product Type - ENGINE AIR FILTER
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Manufacturer images
Manufacturer specifications
- Product Grade
- Replacement Part
- Brand
- Denso
- Fit Type
- Vehicle Specific Fit
- Product Dimensions
- 9.38"L x 9.09"W x 1.61"H
- OEM Part Number
- 143-3199
- Brand Name
- Denso
- Model Number
- 143-3199
- OEM Equivalent Part Number
- 143-3199
- Manufacturer Part Number
- 143-3199
- Global Trade Identification Number
- 00042511215061
- Manufacturer
- DENSO
- UPC
- 042511215061
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Top Amazon review
↗External — Amazon's most-helpful review for context.
Good replacement
Fast shipping. Perfect replacement and fit for the 2013 Subaru OutbackQuality looks to be as good as the original Denso filter.