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title: "donaldson p821575 air filter — Niche Verdict: Worth a look (53/100) | Amazon United States - Flapen"
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last_updated: "2026-07-14T01:49:34.524Z"
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  description: "donaldson p821575 air filter shows searches that convert (16.3% search→purchase), but a concentrated shelf (top 5 take 80% of clicks) keeps it on the watch list."
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  "og:title": "donaldson p821575 air filter — Niche Verdict: Worth a look (53/100) | Amazon United States - Flapen"
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# **donaldson p821575 air filter**

**Worth a look**

Shows searches that convert (16.3% search→purchase), but a concentrated shelf (top 5 take 80% of clicks) keeps it on the watch list.

Market size 24Growth 57Conversion 98Competition 16Returns 95Price range 95Avg price 95Brand share 31Review moat 91Quality gap 20

**Conversion**

**Incredible****16.3%**

search→purchase rate — share of searches ending in a sale

**Returns**

**Incredible****0.9%**

return rate — above 6% kills the launch gate

**Avg price**

**Incredible****$24.51**

avg listing price — sweet spot $15–$100

**Price range**

**Incredible****$15.12–$58.94**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Review moat**

**Great****189.9**

avg incumbent reviews — the moat a new listing must climb

**Growth**

**Good****+32.0%**

90-day search growth — must beat 0% to launch

**Brand share**

**Okay****86%**

top-5 brand share — brands hold most of the demand

**Market size**

**Bad****$97K**

$97K/yr · 24K searches

**Quality gap**

**Bad****4.7★**

avg incumbent rating — lower means beatable quality

**Competition**

**Bad****80%**

top-5 click share — a locked-up shelf

## **Competition**

The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**8 **▼falling

**Sellers**

**27**

**Top-5 brand share**

**86%**

**Open market**

**6%**

- Donaldson31% - Deflife23% - C-Tzu14% - Aftermarket Filtration Experts9% - Hipa9% - Generic8% - Open — no brand owns it (2 brands, 6%)

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$10K20%$19K30%$29K40%$39K101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 10 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Donaldson P821575 Primary Radial Seal Air Filter](https://m.media-amazon.com/images/I/41+lHSwrZIL.jpg)**Donaldson P821575 Primary Radial Seal Air Filter**Donaldson**$20.69**4.8★485 rev](https://www.amazon.com/dp/B00KNIUUCC) [2![For Kawasaki 11013-7044 & 11013-7045 Inner & Outer Air Filter Cleaners Combo OEM for Donaldson Kohler 25-083-01-S P821575 & P822858](https://m.media-amazon.com/images/I/51mwhliik6S.jpg)**For Kawasaki 11013-7044 & 11013-7045 Inner & Outer Air Filter Cleaners Combo OEM for Donaldson Kohler 25-083-01-S P821575 & P822858**Deflife**$15.66**4.8★672 rev](https://www.amazon.com/dp/B0936YMQ4V) [3![P821575 & P822858 Outer Air Filter & Inner Filter 11013-7044 & 11013-7045 Compatible with Donaldson FPG05 Air Cleaners Replaces #6672467 6672468 PM252Z PM260Z](https://m.media-amazon.com/images/I/41EyZ241SYL.jpg)**P821575 & P822858 Outer Air Filter & Inner Filter 11013-7044 & 11013-7045 Compatible with Donaldson FPG05 Air Cleaners Replaces #6672467 6672468 PM252Z PM260Z**C-Tzu**$15.57**4.3★37 rev](https://www.amazon.com/dp/B0D7VRNVQF) [4![Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300](https://m.media-amazon.com/images/I/51o6-VgmS-L.jpg)**Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300**Hipa**$17.42**4.6★247 rev](https://www.amazon.com/dp/B0BKZM3H4X) [5![C-Tzu P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners](https://m.media-amazon.com/images/I/41PacUSenqL.jpg)**C-Tzu P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners**Generic**$15.65**4.6★119 rev](https://www.amazon.com/dp/B0C589953X)

**~~View all top sellers →~~**

### **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](https://m.media-amazon.com/images/I/41EyZ241SYL.jpg)**P821575 & P822858 Outer Air Filter & Inner Filter 11013-7044 & 11013-7045 Compatible with Donaldson FPG05 Air Cleaners Replaces #6672467 6672468 PM252Z PM260Z**C-Tzu**$15.57**37 rev2y ago](https://www.amazon.com/dp/B0D7VRNVQF) [![2 Sets P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners Replaces 6672467 6672468](https://m.media-amazon.com/images/I/51qvXgUecsL.jpg)**2 Sets P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners Replaces 6672467 6672468**C-Tzu**$24.99**18 rev2y ago](https://www.amazon.com/dp/B0CHVRPLGL) [![P821575 & P822858 Outer Inner Air Filter Air Cleaner for Bobcat FPG05 Air Cleaners Replaces# 6672467 6672468 PM252Z PM260Z](https://m.media-amazon.com/images/I/51zW9Wef9-L.jpg)**P821575 & P822858 Outer Inner Air Filter Air Cleaner for Bobcat FPG05 Air Cleaners Replaces# 6672467 6672468 PM252Z PM260Z**X4XZ**$15.12**109 rev3y ago](https://www.amazon.com/dp/B0C5H23RM4) [![C-Tzu P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners](https://m.media-amazon.com/images/I/41PacUSenqL.jpg)**C-Tzu P821575 & P822858 Outer Air Filter & Inner Filter Compatible with Donaldson FPG05 Air Cleaners**Generic**$15.65**119 rev3y ago](https://www.amazon.com/dp/B0C589953X) [![Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300](https://m.media-amazon.com/images/I/51o6-VgmS-L.jpg)**Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300**Hipa**$17.42**247 rev3y ago](https://www.amazon.com/dp/B0BKZM3H4X)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Donaldson P821575 Air Filter Primary (Pack of 3)](https://m.media-amazon.com/images/I/41-zYabmxoL.jpg)**Donaldson P821575 Air Filter Primary (Pack of 3)**Aftermarket Filtration Experts**$58.94**5.0★**▲ 61%**](https://www.amazon.com/dp/B01IX021CS) [![For Kawasaki 11013-7044 & 11013-7045 Inner & Outer Air Filter Cleaners Combo OEM for Donaldson Kohler 25-083-01-S P821575 & P822858](https://m.media-amazon.com/images/I/51mwhliik6S.jpg)**For Kawasaki 11013-7044 & 11013-7045 Inner & Outer Air Filter Cleaners Combo OEM for Donaldson Kohler 25-083-01-S P821575 & P822858**Deflife**$15.66**4.8★**▲ 56%**](https://www.amazon.com/dp/B0936YMQ4V) [![Donaldson P821575 Air Filter Primary (Pack of 2)](https://m.media-amazon.com/images/I/41SjV1tMVzL.jpg)**Donaldson P821575 Air Filter Primary (Pack of 2)**Aftermarket Filtration Experts**$35.73**4.9★**▲ 45%**](https://www.amazon.com/dp/B01LYJRSI5) [![Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300](https://m.media-amazon.com/images/I/51o6-VgmS-L.jpg)**Hipa P821575 P822858 Outer Inner Air Filter for Donaldson FPG05 New Holland TC30 TC33D T1520 TC29D Kubota L3130 L4600 L3940 L3940 L3300**Hipa**$17.42**4.6★**▲ 42%**](https://www.amazon.com/dp/B0BKZM3H4X) [![2sets Air Filters Fit for Donaldson P821575 & P822858 Kawasaki 11013-7044 11013-7045 Briggs & Stratton 841497 821136 Fleetguard AF25551 AF25552](https://m.media-amazon.com/images/I/51I9WZ4FpYL.jpg)**2sets Air Filters Fit for Donaldson P821575 & P822858 Kawasaki 11013-7044 11013-7045 Briggs & Stratton 841497 821136 Fleetguard AF25551 AF25552**OLIFANT**$25.32**4.7★**▲ 31%**](https://www.amazon.com/dp/B09YMFHXVX)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 103 weeks — +32.0% search growth over the last 90 days.

2K1KSpike '25Spike '26 seasonDecMarJunAugNovMarMay

Peak months: Mar, Apr, May · busiest ÷ quietest = 8.3×

## **Reviews**

What buyers praise and complain about, mined from review topics.

### **What buyers love **

**Size-Overall**36%

*“Fit perfect”*

**Filtration**16%

*“Exact air filter”*

**Quality-Overall**15%

*“Good quality”*

**Value For Money**12%

*“Great product reasonably priced”*

**Advertised Vs Actual Product**10%

*“Worked and appeared oem”*

**Efficiency**6%

*“Work perfectly”*

**Assembly/Installation**3%

*“easy to install”*

**Ease Of Cleaning**3%

*“Clean machine”*

### **What buyers complain about **

**Filtration**50%

*“The inner filter seldom encounters dirt”*

**Advertised Vs Actual Product**38%

*“False advertising”*

**Compatibility-Overall**13%

*“This filter does not fit the Kubota L3300”*

### **Top return reasons **

**Size-Overall**63%

**Compatibility-Overall**17%

**Filtration**9%

**Advertised Vs Actual Product**4%

**Quality-Overall**3%

**Defective Material/Parts**2%

**Functionality-Overall**1%

**Design-Overall**1%

**Value For Money**1%

**Motor Issues**1%