Donaldson P821575 Air Filter
MaybeBuyers convert on 16.3% of searches. But the top 5 products take 80% of clicks, so Donaldson P821575 Air Filter is a Maybe.
- Flapen Score
- 53 / 100Top 31% of 7,287 Automotive niches · +4 vs the category median of 4953
- Market size
- $97K/yr24K searches / yr
- 90-day growth
- +32.0%search demand this quarter
- Competition
- 80%top-5 click share · 8 brands · 27 sellers
Flapen Score
Donaldson P821575 Air Filter against its category
The dotted line is the Automotive average. Past it, Donaldson P821575 Air Filter is stronger. Inside it, weaker.
Market
The Donaldson P821575 Air Filter market on Amazon at a glance
Shoppers on Amazon United States searched for Donaldson P821575 Air Filter 24K times last year and spent an estimated $97K. The top 5 brands take 86% of clicks. Demand peaks in Mar–Apr–May. Flapen scores it 53 out of 100, a Maybe.
01 · Demand
An estimated 16.3% of those searches ended in a purchase.
Shoppers searched for this 24K times in the last 12 months. That counts every search on Amazon United States for this niche's terms. An estimated 16.3% of those searches ended in a purchase. Searches in the last 90 days moved +32.0% against the 90 days before. Searches, conversion and average price together put the market at an estimated $97K a year.
- Searches, last 12 months
- 24K
- Growth, 90 days vs prior 90
- +32.0%
- Conversion, latest week
- 16.3%
- Market size, estimated
- $97Ka year
- Peak month
- May8.3× the quietest month
- Top search term
- donaldson p821575 air filter11K searches a year
02 · Price
A sale here is worth $24.51.
Listings sell for $24.51 on average, from $15.12 to $58.94. Amazon reports units sold in ranges. This niche sold 5K to 6K a year. The average listing sells 250 to 500 of them. At $24.51 that is $6K to $12K a year per listing.
- Average price
- $24.51inside the $15 to $100 sweet spot
- Price range
- $15.12–$58.94
- Amazon United States median price
- $24.38across 115,062 niches
- Units sold a year
- 5K–6K
- Units per listing a year
- 250–500
- Revenue per listing a year
- $6K–$12K
- Returns
- 0.9%of orders · Amazon United States median 2.1%
03 · Entry bar
The bar here is low.
90% of listings pay for placement with sponsored ads. 100% ship with Prime. On an average day, 0.6% of listings are out of stock. The average listing ranks #1,808 within Filters. It carries 190 reviews at 4.68 stars, so a new listing needs social proof before a better product.
- Sponsored listings
- 90%
- Prime listings
- 100%
- Out of stock, average day
- 0.6%
- Average rank
- #1,808in Filters
- Average rating
- 4.68 starsAmazon United States average 4.42 stars
- Average reviews
- 190per listing
- Listings tracked
- 10
04 · Newcomers
Brands here are young.
The brands on the shelf have sold for 30 months on average, so a newcomer is not facing entrenched names.
- Launched, last 12 months
- 0
- Successful launches
- 0Amazon's first-year sales bar
- Average brand age
- 30 months
Products
Top Donaldson P821575 Air Filter products & what they sell for
The products selling here, as shoppers see them on Amazon. Shelf share and sales are our estimates.
Prices and ratings read from Amazon on Jul 9, 2026. The live listing can differ.
Top sellers
by estimated 90-day click share
Donaldson P821575 Primary Radial Seal Air Filter
- Price
- $20.69
- Rating
- 4.8/5
- Reviews
- 485
- Age
- 12y ago

For Kawasaki 11013-7044 & 11013-7045 Inner & Outer Air Filter Cleaners Combo OEM for Donaldson Kohler 25-083-01-S P821575 & P822858
- Price
- $15.66
- Rating
- 4.8/5
- Reviews
- 672
- Age
- 5y ago

P821575 & P822858 Outer Air Filter & Inner Filter 11013-7044 & 11013-7045 Compatible with Donaldson FPG05 Air Cleaners Replaces #6672467 6672468 PM252Z PM260Z
- Price
- $15.57
- Rating
- 4.3/5
- Reviews
- 37
- Age
- 2y ago

Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300
- Price
- $17.42
- Rating
- 4.6/5
- Reviews
- 247
- Age
- 3y ago

C-Tzu P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners
- Price
- $15.65
- Rating
- 4.6/5
- Reviews
- 119
- Age
- 3y ago
Trending
estimated 90-day click momentum
Donaldson P821575 Air Filter Primary (Pack of 3)
- Price
- $58.94
- Rating
- 5.0/5
- Reviews
- 21
- Age
- 9y ago

For Kawasaki 11013-7044 & 11013-7045 Inner & Outer Air Filter Cleaners Combo OEM for Donaldson Kohler 25-083-01-S P821575 & P822858
- Price
- $15.66
- Rating
- 4.8/5
- Reviews
- 672
- Age
- 5y ago

Donaldson P821575 Air Filter Primary (Pack of 2)
- Price
- $35.73
- Rating
- 4.9/5
- Reviews
- 119
- Age
- 9y ago

Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300
- Price
- $17.42
- Rating
- 4.6/5
- Reviews
- 247
- Age
- 3y ago

2sets Air Filters Fit for Donaldson P821575 & P822858 Kawasaki 11013-7044 11013-7045 Briggs & Stratton 841497 821136 Fleetguard AF25551 AF25552
- Price
- $25.32
- Rating
- 4.7/5
- Reviews
- 72
- Age
- 4y ago
Newest
by launch date
P821575 & P822858 Outer Air Filter & Inner Filter 11013-7044 & 11013-7045 Compatible with Donaldson FPG05 Air Cleaners Replaces #6672467 6672468 PM252Z PM260Z
- Price
- $15.57
- Rating
- 4.3/5
- Reviews
- 37
- Age
- 2y ago

2 Sets P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners Replaces 6672467 6672468
- Price
- $24.99
- Rating
- 4.4/5
- Reviews
- 18
- Age
- 2y ago

P821575 & P822858 Outer Inner Air Filter Air Cleaner for Bobcat FPG05 Air Cleaners Replaces# 6672467 6672468 PM252Z PM260Z
- Price
- $15.12
- Rating
- 4.7/5
- Reviews
- 109
- Age
- 3y ago

C-Tzu P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners
- Price
- $15.65
- Rating
- 4.6/5
- Reviews
- 119
- Age
- 3y ago

Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300
- Price
- $17.42
- Rating
- 4.6/5
- Reviews
- 247
- Age
- 3y ago
Competition
Competition: brands, sellers & click share
The top 5 products take an estimated 80% of clicks. A locked shelf that new listings rarely crack.
Brands
8 falling
Sellers
27
Est. top-5 brand share
86%
Top 20: 100%
Est. top-5 click share
80%
Top 20: 100%
Open market
6%
- Donaldson31%
- Deflife23%
- C-Tzu14%
- Aftermarket Filtration Experts9%
- Hipa9%
- Generic8%
- Open — no brand owns it (2 brands, 6%)
Demand
Donaldson P821575 Air Filter search demand
Weekly searches over the year, seasonality beneath. Pick a range.
Peak months: Mar, Apr, May · busiest ÷ quietest = 8.3×
Search terms
Top Donaldson P821575 Air Filter search terms shoppers use
The exact words shoppers type, with estimated yearly volume, growth, and conversion.
- donaldson p821575 air filter11K/yr
- p8215756K/yr
- donaldson p8215754K/yr
- p821575 air filter3K/yr
Reviews and returns
What reviews say buyers love and hate about Donaldson P821575 Air Filter
We read the reviews and the return reasons for every product selling here.
“The inner filter seldom encounters dirt”
Every topic
Every topic buyers talk about, one row each.
Red shows the share of negative reviews and green the share of positive reviews, biggest topic first. Open a row to read what they wrote.
13 topics
Keep looking
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Best Flapen score
The highest-scoring niches we track right now, across every category.
FAQ
Common Donaldson P821575 Air Filter questions
Answered from the same tracked data.
Figures on this page are estimates modeled from public Amazon pages and third-party keyword data. Amazon does not supply them, and no connected seller's data is used. How we handle Amazon data









