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Air Flow Meter for BMW 13627567451: Engine Management Parts and Fitment Specs

Quick Answer: BMW air flow meter part number 13627567451 is a hot-film mass air flow sensor built for direct intake air mass measurement in kg/h. It cross-references to Bosch 0280218062 and fits many N52 and N53 petrol engines. The same thermal mass flow principle works in industrial gas flow instruments for compressed air, natural gas, and biogas up to DN200.

What Is the BMW 13627567451 Air Flow Meter

This MAF sensor sits right after the air filter housing on the intake tract. It uses a heated thin-film resistor element. The ECU keeps that element at a constant temperature above the incoming air. More cooling airflow demands more heating current. The ECU converts that current into a precise mass flow value. No separate air temperature or pressure correction is needed because you get a direct mass reading. BMW used this sensor generation on several engines to meet tight Euro emission limits. The OEM supplier is Bosch, and the Bosch service number is 0280218062. In practice, many workshops buy either the genuine BMW part or the Bosch equivalent because they are identical.

BMW Models and Engine Fitment

Part number 13627567451 works on multiple BMW platforms. You will find it on E90, E91, E92, and E93 3 Series with N52 B25 or N52 B30 engines. It also fits E60 and E61 5 Series, E63 and E64 6 Series, E70 X5, and E83 X3, all with similar naturally aspirated six-cylinder petrol engines. Some early N53 direct-injection engines also used it. Always check your vehicle VIN and the original part label before ordering. A quick look at the connector housing shape and the mesh screen design tells you whether it matches. Bosch MAF sensors often carry a stamped alpha-numeric batch code and a date wheel on the plastic housing. We have seen counterfeit units on Southeast Asian e-commerce platforms with missing date codes.

Symptoms of a Failing MAF Sensor

A failing 13627567451 MAF typically shows rough idle, hesitation on light throttle, and black smoke from the exhaust. The engine may stall when you dip the clutch. Diagnostic trouble codes P0101 (range/performance) and P0102 (low input) are the most common. Fuel trim values in live data go far positive or negative. Here is the thing: a dirty sensor element often causes drift before a hard failure. Cleaning with a proper MAF spray sometimes restores response for a few months. Most mechanics skip checking the air filter housing seal. A tiny leak lets unfiltered dust hit the hot-film surface and slowly kills the sensor. On industrial gas measurement sites we see the same failure pattern, dirt and oil mist destroy sensor accuracy.

Thermal Mass Flow Technology in Industrial Instruments

The principle behind the BMW MAF is the same one we use in our inline thermal mass flow meters. A heated sensor element loses heat to the flowing gas. The cooling rate is proportional to mass flow, not volume flow. Because of this, you can measure compressed air flow at 8 bar directly in kg/h without pressure compensation. Silver Instruments builds thermal mass flow meters for pipe sizes from DN15 up to DN200. Typical applications include compressed air system balancing, natural gas submetering, biogas flare monitoring, and nitrogen blanketing. Our meters output 4-20 mA HART, Modbus RTU, or pulse. For Zone 1 hazardous areas we supply ATEX-certified models with stainless steel probes and integral or remote electronics. Last year a food factory in Vietnam replaced a compressed air venturi meter with our ST10 thermal mass unit. They sent gas composition, line pressure 4 bar, temperature 30 degree C, and pipe size DN65. We calibrated the meter on air and shipped within two weeks.

Get a Quote for Your Industrial Gas Flow Meter

We do not sell automotive MAF sensors. We manufacture industrial thermal mass flow meter