K&N BM-1121 Air filter BMW R12 & R12 NineT
€93.50
Tax included check_circleIn stock
The K&N BM-1121 high-flow air filter replaces the restrictive paper element on your BMW R NineT or R12 with oiled cotton gauze that flows more air, traps fine particles, and is fully washable. No jetting changes required—just drop it in and ride.
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Your BMW boxer engine thrives on airflow. The stock paper filter chokes it slowly; the K&N BM-1121 replaces that disposable element with an oiled cotton gauze medium that flows more air, traps finer particles, and you can wash it and reuse it for the life of the bike. No fuel management tweaks needed, either—the filter is designed to work with the OEM ECU calibration across the entire R NineT and R12 range.
Why Swap to a K&N BM-1121?
- Pleated cotton media provides a large filtration area with low restriction, so throttle response sharpens without voiding your factory tune.
- Multiple layers of woven cotton gauze trap dirt without choking intake at high RPM — a must for boxer engines that pull hard from down low.
- Pre-oiled and ready to install; washable and reusable, slashing long-term maintenance costs and landfill waste.
- Direct drop-in fit into the OEM airbox with a moulded sealing bead — no cutting, drilling or modifications required.
- Replaces BMW original reference 13728406673.
Technical Specifications
- Model: BMW R NineT
- Model: BMW R NineT Scrambler
- Model: BMW R NineT Pure
- Model: BMW R NineT Racer
- Model: BMW R NineT Urban GS
- Model: BMW R 12 NineT
- Model: BMW R 12
- Year: 2019
- Year: 2020
- Year: 2021
- Year: 2022
- Year: 2023
- Year: 2024
- Year: 2025
- Year: 2026
- Year: 2014
- Year: 2015
- Year: 2016
- Year: 2017
- Year: 2018
From early R NineT roadsters to the latest R12 platform, this filter drops straight into the factory airbox with zero guesswork. The oiled cotton medium doesn’t need re-oiling out of the box — fit it, forget it, and finally stop buying disposable paper filters every season.
FAQ
Is the K&N BM-1121 pre-oiled and ready to install?
Yes, the filter comes pre-oiled from K&N and is ready to drop into your airbox straight out of the package. No additional oiling is needed before first use.
Does this air filter require any fuel management changes?
No adjustments are necessary. The K&N BM-1121 is engineered to work with the factory ECU mapping, so jetting or remapping is not required on R NineT or R12 models.
Will the K&N BM-1121 fit my 2024 BMW R12 NineT?
Absolutely. It fits all R12 NineT and R12 models from 2024 onward, as well as the entire R NineT family built between 2014 and 2023.
What OEM BMW filter does this replace?
It directly replaces the original BMW air filter with part number 13728406673. No adapters or modifications are needed for the swap.
R12-1-1550
1 Item
Data sheet
- Model
- BMW R 12
BMW R 12 NineT
BMW R NineT
BMW R NineT Pure
BMW R NineT Racer
BMW R NineT Scrambler
BMW R NineT Urban GS - Year
- 2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
Specific References
- EAN13
- 024844392220
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The K&N BM-1121 high-flow air filter replaces the restrictive paper element on your BMW R NineT or R12 with oiled cotton gauze that flows more air, traps fine particles, and is fully washable. No jetting changes required—just drop it in and ride.