Direct OEM-replacement engine air filter for BMW 3 Series and 4 Series with N20, N26, and B46/B48 engines — engineered to factory specifications for maximum engine protection and performance.
Features
- Direct OEM replacement (Part# 13718509032 / 13718507320)
- High-efficiency filtration media — blocks dust, debris, and fine particles from engine intake
- Maintains factory air flow rate for optimal fuel economy and power
- Exact fitment — no modifications required
- Recommended replacement interval: every 30,000–50,000 km
Compatible Models
| Series | Chassis Code | Engine | Years |
|---|---|---|---|
| BMW 3 Series Sedan | F30 | N20 / N26 (320i, 328i) | 2012–2019 |
| BMW 3 Series Touring | F31 | N20 (320i, 328i) | 2012–2019 |
| BMW 4 Series Coupe | F32 | N20 (428i) | 2013–2020 |
| BMW 3 Series GT | F34 | N20 (320i, 328i) | 2013–2020 |
| BMW 4 Series Gran Coupe | F36 | N20 (420i, 428i) | 2014–2020 |
| BMW 3 Series Sedan | G20 | B46 (330i) | 2019–2024 |
| BMW 3 Series Touring | G21 | B46 (330i) | 2019–2024 |
| BMW 2 Series | F22 / F23 | N20 (228i) | 2014–2021 |
Specifications
- OEM Part Numbers: 13718509032 / 13718507320
- Brand: Alpina Motorsports
- Condition: New
- Compatible Engines: N20, N26, B46, B48 (2.0L Turbocharged)
Ships to Canada with tracking.
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%20–%20Set%20of%206&url=https://www.alpinamotorsports.com/product/genuine-bmw-s55-spark-plug-ngk-97506-m2-m3-m4-2-step-colder-12120039634/&media=https://i0.wp.com/www.alpinamotorsports.com/wp-content/uploads/2026/05/genuine-bmw-s55-spark-plug-ngk-97506-m2-m3-m4-1-step-colder.jpg?fit=800%2C800&ssl=1){kind=link}
Henry T. –
Perfect air filter for my G20 B46. Easy swap, engine runs cleanly. OEM equivalent quality.
Jake M. –
Good air filter. Fits perfectly and the quality looks solid. Fast delivery.
Alan HH. –
Excellent air filter for my F30 N20. Perfect fit and engine runs cleanly. OEM quality.
Barry HH. –
Great filter. Exact fit for my G20 and engine performance is maintained. Easy swap.
Carl HH. –
Good filter. Fits my N20 F30 correctly and quality is solid. Easy install. Fast delivery.
Dave HH. –
Perfect air filter. OEM fit for my G20 N20 and the engine runs cleanly. Easy swap.
Ed HH. –
Good filter. Fits correctly on my F30 N20 and quality is solid. Easy to install.
Frank HH. –
Excellent air filter for the N20. Exact fit and OEM quality. Engine runs cleanly after swap.
Gary HH. –
Good filter. Fits the G20 N20 correctly and quality is solid. Fast delivery and easy install.
Hank HH. –
Perfect air filter for my F30 N20. OEM quality and exact fit. Engine runs cleanly. Great value.