What are the two types of Mass Air Flow Sensors used on the BMW M3?

Two types of Mass Air Flow (MAF) sensors are used in the operation of a vehicle. The electro-mechanical vane type sensor consists of an air vane that moves a potentiometer, which calculates the air flow. The fully electronic MAF sensor, on the other hand, has no moving parts and measures the intake air flow electronically. Both sensors provide information to the Engine Control Module (ECM) to adjust the fuel-to-air ratio and control the fuel injectors accordingly. The MAF sensor calculates the intake air volume by using a reference current to heat a thin wire, which is then converted into a voltage measurement. This system allows for precise adjustment of the fuel mixture based on atmospheric conditions. In cars equipped with Automatic Slip Control and Traction (ASC+T), an additional throttle valve is controlled by an electronic throttle actuating motor for traction control purposes. When testing the MAF sensor, it is important to avoid touching the hot wire element or any electronic parts inside and to protect the element from dirt and fluids. The MAF sensor can be checked for faults using diagnostic equipment or by following specific steps, such as checking for a 5 volt signal and monitoring the ohmmeter readings. If the MAF sensor is faulty, the Check Engine light will be activated and a Diagnostic Trouble Code (DTC) will be stored. When removing or installing the MAF sensor, it is important to disconnect the electrical connector, loosen the necessary clamps, and secure the sensor properly.

Genuine BMW M3 Mass Air Flow Sensor

MAF Sensor Meter

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BMW M3 Mass Air Flow Sensor
Part Number: 13627602038
$313.95 MSRP: $497.76
You Save: $183.81 (37%)
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Product Specifications
- Other Name: Hot-Film Air Mass Meter; Air Mass Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2015-2018 BMW M3 | Sedan(F80)
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BMW M3 Mass Air Flow Sensor
Part Number: 13621747155
$586.83 MSRP: $767.82
You Save: $180.99 (24%)
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Product Specifications
- Other Name: Hot-Film Air Mass Meter; Air Mass Sensor
- Replaces: 13-62-1-468-624
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1995-1996 BMW M3 | Coupe(E36)
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BMW M3 Mass Air Flow Sensor
Part Number: 13627839014
$274.87 MSRP: $435.80
You Save: $160.93 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Hot-Film Air Mass Meter; Air Mass Sensor
- Replaces: 13-62-7-830-359
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 2001-2006 BMW M3 | Convertible(E46), Coupe(E46)
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BMW M3 Mass Air Flow Sensor
Part Number: 13627547982
$859.27 MSRP: $1121.55
You Save: $262.28 (24%)
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Product Specifications
- Other Name: Exchange-Mass Air Flow Sensor; Air Mass Sensor
- Replaces: 13-62-1-307-486, 13-62-1-466-352
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Air-Flow Sensor
Part Number: 13621466352
$859.27 MSRP: $1121.55
You Save: $262.28 (24%)
Ships in 1-3 Business Days
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Product Specifications
- Replaced by: 13627547982
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Mass Air Flow Sensor
Part Number: 13621307486
$859.27 MSRP: $1121.55
You Save: $262.28 (24%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Volume Air Flow Sensor
- Replaced by: 13627547982
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1988-1991 BMW M3 | Coupe(E30)
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BMW M3 Mass Air Flow Sensor
Part Number: 13621703275
$669.19 MSRP: $875.58
You Save: $206.39 (24%)
Product Specifications
- Other Name: Hot-Film Air Mass Meter; Air Mass Sensor
- Warranty: This genuine part is guaranteed by BMW's factory warranty.
Fits the following Vehicles:
- 1997-1999 BMW M3 | Convertible(E36), Coupe(E36), Sedan(E36)

BMW M3 Mass Air Flow Sensor

The BMW M3 Mass Air Flow Sensor is the intake system's highly important monitor as it relays the air volume information so the fuel delivery can remain matched for sharp throttle response. Nestled between the air filter and intake manifold is this Mass Air Flow Sensor, which supplies the ECU with airflow numbers and allows the computer to fine-tune the injector pulse width for all conditions, from idle to redline. Throughout BMW history, there have been two styles, the vane air flow meter and the hot wire design. The vane version is based on a spring-loaded flap that swings with incoming air, but its moving parts can wear and cause a slight restriction of breathing. The hot wire Mass Air Flow Sensor avoids that flap by heating a thin wire whose cooling rate indicates airflow, providing faster response and reduced intake resistance, but allowing for contamination of the wire with pollutants that will distort readings. Modern M3 versions are all based on the hot wire Mass Air Flow Sensor with its low restriction. If grime builds up or the sensor fails, hesitation, stalling, and warning lights ensue, so cleaning the Mass Air Flow Sensor regularly is smart practice for any BMW fan that wishes to have crisp M3 power and maintain that legendary BMW driving feeling.

If you are looking for OEM BMW M3 Mass Air Flow Sensor, we highly recommend to shop with us. Not only do we offer budget friendly prices, but we also provide fast delivery. In addition, we have a hassle-free return policy on all genuine BMW M3 Mass Air Flow Sensor that come backed by the manufacturer's warranty.

BMW M3 Mass Air Flow Sensor Parts Questions & Experts Answers

Mass Air Flow Sensor
13621747155
Q:
What are the two types of Mass Air Flow Sensors used on the BMW M3?
Posted by Dora A.
A:
Two types of Mass Air Flow (MAF) sensors are used in the operation of a vehicle. The electro-mechanical vane type sensor consists of an air vane that moves a potentiometer, which calculates the air flow. The fully electronic MAF sensor, on the other hand, has no moving parts and measures the intake air flow electronically. Both sensors provide information to the Engine Control Module (ECM) to adjust the fuel-to-air ratio and control the fuel injectors accordingly. The MAF sensor calculates the intake air volume by using a reference current to heat a thin wire, which is then converted into a voltage measurement. This system allows for precise adjustment of the fuel mixture based on atmospheric conditions. In cars equipped with Automatic Slip Control and Traction (ASC+T), an additional throttle valve is controlled by an electronic throttle actuating motor for traction control purposes. When testing the MAF sensor, it is important to avoid touching the hot wire element or any electronic parts inside and to protect the element from dirt and fluids. The MAF sensor can be checked for faults using diagnostic equipment or by following specific steps, such as checking for a 5 volt signal and monitoring the ohmmeter readings. If the MAF sensor is faulty, the Check Engine light will be activated and a Diagnostic Trouble Code (DTC) will be stored. When removing or installing the MAF sensor, it is important to disconnect the electrical connector, loosen the necessary clamps, and secure the sensor properly.
Answered by BMW Parts Specialist Noah / Jan 10, 2025