BMW Mass Air Sensor & Air Flow Meters for BMW 5 Series E34 (1987-1995)

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We sell OEM air mass sensors, air flow meters, and HFMs (Hot Film Meter) for many BMWs. When the mass air sensor is bad you will notice your engine running out of tune. Your fuel mileage will suffer, throttle response will be poor, and you will notice a lack of power.

There should be a Check Engine Light to alert you that the air sensor is having problems. However, there may not be a fault code for the air meter itself. Often times the code comes up as fuel trim or lean condition. In these cases the air sensor could be just one of a number of potential problems.

We only sell air sensors from Original Equipment Manufacturers like, Bosch, VDO, and Siemens. Please note that HFMs are an electrical part and cannot be returned for refund.
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Bremi Mass Air Flow Sensor - E34 525i 530i, E36 M50 S50 3.0L ...
For vehicles with production date from 09/1992
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Bremi - Corporate Logo
T#:642177
Part#: 13621747155
In Stock at Vendor
$ 214.99

This product was last offered at the strikethrough price on
05-07-2026

$ 208.99 USD
Free Shipping on orders $49 and up
$ 208.99 USD
Free Shipping on orders $49 and up
The mass airflow sensor measures the amount of airflow to tell the computer how much fuel to add to the mixture. If the MAF sensor malfunctions, there could be too much or too little fuel added to the mixture. Restore performance and fuel mileage with a high-quality Bremi replacement. Replacement mass air sensor (HFM) for M50, S50-US engine. The M50 engines in the E36 and E34 have a notorious fault for hesitation and sluggish response. If this is your situation the MAF should be on your list to check. The HFM is easy to replace and could cure a variety of problems. We also sell HFM sensor cleaner that may clear your problem (see below). This mass air sensor also fits the M60B30 engine. 3.0" diameter. For vehicles with a production date from 09/1992. As a leading source of high-performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts. All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform! Complete Application List: 1993-95 E34 525i - M50 engine with VAN0S (M50TU) 1993-95 E36 325i, 325is, 325iC - M50 engine with VAN0S (M50TU) 1995 E36 M3 3.0-liter 1994-95 E34 530i - M60 3.0-liter engine
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Bremi Mass Air Flow Sensor (MAF) - E31, E32, E34, E38, E39
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremi - Corporate Logo
T#:584181
Part#: 13621702078
Ships in 4 Business Days
$ 193.99

This product was last offered at the strikethrough price on
05-07-2026

$ 188.99 USD
Free Shipping
$ 188.99 USD
Free Shipping
Controls the air / fuel mixture of the engine, usually deteriorates over time affecting engine performance
Intake Thermostat - M50 - E36 325i M3, E34 525i
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:4475
Part#: 13541730682
In Stock
4% off MSRP $ 70.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 67.99 USD
Free Shipping
4% off MSRP
$ 70.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 67.99 USD
Free Shipping
This intake air temperature thermostat. This controls the flow of coolant to the throttle body.

This item fits the following BMWs:
1992-1995 E36 BMW 325i 325is 325ic M3
1991-1995 E34 BMW 525i
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Auxiliary Thermostat
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Bremmen Parts - Corporate Logo
T#:26538314
Part#: 13541730682
In Stock
$ 63.99

This product was last offered at the strikethrough price on
05-03-2026

$ 44.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up
$ 63.99

This product was last offered at the strikethrough price on
05-03-2026

$ 44.99 USD
Limited Qty Sale
Free Shipping on orders $49 and up

Genuine BMW Throttle Position Sensor M20 M50 Engine
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Genuine BMW - Corporate Logo
T#:367860
Part#: 13631710559
Ships in 1-2 days
8% off MSRP $ 381.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 349.99 USD
Free Shipping
8% off MSRP
$ 381.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 349.99 USD
Free Shipping

Enhance the performance of your BMW equipped with M20 or M50 engines with the Turner Motorsport Genuine Throttle Position Sensor. Over time, the throttle position sensor can deteriorate, affecting the vehicle's driveability. Replace it with a new, genuine BMW sensor to ensure optimal performance and responsiveness.

  • Genuine BMW part guarantees quality and compatibility
  • Restores accurate throttle response
  • Ensures proper engine performance and drivability
  • Easy installation for hassle-free maintenance
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Genuine BMW Mass Air Flow Sensor - E28 E34 535i - E24 635csi - E23 E3...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:374417
Part#: 13627547981COKT
Ships in 7 Business Days
$ 1,179.99 USD
Free Shipping
$ 1,179.99 USD
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Genuine BMW Replacement mass air sensor - air flow meter - (HFM) for M30 engine. The M30 engines have a notorious fault for hesitation and sluggish response. If this is your situation the MAF should be on your list to check. The HFM is easy to replace and could cure a variety of problems.

Price includes a $50.00 core charge.

This item fits the following BMWs:
1985-1988 E28 BMW 535i 535is
1989-1993 E34 BMW 535i 
1985-1989 E24 BMW 635csi
1985-1987 E23 BMW 735i
1988-1994 E32 BMW 735i 735il

Also for E30 M3 EVO III
 

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OEM Bosch HFM/Mass Air Sensor - E32, E34, E38, E39 with M60/M62 4.0-l...
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2X Entries For Our G87 M2 Sweepstakes! We Price Match - Give Us A Call or Chat!
Bosch - Corporate Logo
T#:6055
Part#: 13621702078
Back Ordered
$ 382.99

This product was last offered at the strikethrough price on
05-07-2026

$ 371.99 USD
Free Shipping
$ 371.99 USD
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The mass air flow sensor measures the amount of air flow to tell the computer how much fuel to add to the mixture. If the MAF sensor malfunctions, there could be too much or too little fuel added to the mixture. Restore performance and fuel mileage with a high quality Bosch ( #0 280 217 800) replacement. OEM replacement for BMW part # 13621702078 and 13621468625. For vehicles with a production date up to 09/1998. This sensor is also known as the "540 HFM" that is used in a variety of OBD-1 E36 M3 upgrades.

Bosch is one of the largest OEM producers of Genuine BMW and aftermarket parts in the world, providing parts for almost every major automotive manufacturer. Bosch has likely supplied many of the original electrical (and mechanical) parts for your BMW. Thanks to their quality, high durability, and reliability, you should expect a long service life from Bosch products.

As a leading source of high performance BMW parts and accessories since 1993, we at Turner Motorsport are honored to be the go-to supplier for tens of thousands of enthusiasts the world over. With over two decades of parts, service, and racing experience under our belt, we provide only quality performance and replacement parts.  All of our performance parts are those we would (and do!) install and run on our own cars, as well as replacement parts that are Genuine BMW or from OEM manufacturers. We only offer parts we know you can trust to perform!

Replacement mass air sensor for the M60/M62 engine. The M60 engines have a notorious fault for hesitation and sluggish response. If this is your situation the MAF should be on your list to check. The HFM is easy to replace and could cure a variety of problems.

This replacement HFM fits the following BMWs:
1993-1995 E34 BMW 540i
1997-1998 E39 BMW 540i
1988-1994 E32 BMW 740i 740il
1995-1998 E38 BMW 740i 740il
1990-1999 E31 BMW 840i 840ci

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Mass Air Flow Sensor (MAF)
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:367846
Part#: 13621702078
Ships in 1-2 days
7% off MSRP $ 767.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 714.99 USD
Free Shipping
7% off MSRP
$ 767.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 714.99 USD
Free Shipping
The MAF (Mass Air Flow) sensor regulates the fuel flow through the injectors based on the intake air volume. If your vehicle displays a MAF code, it's crucial to replace it promptly to optimize gas mileage and performance. MAF failure often occurs gradually, leading to decreased fuel efficiency and compromised performance. When it fails completely, the vehicle may stutter and stall, entering a limp mode. A simple test involves unplugging the connector before starting the car. If the idle improves compared to previous poor idling, it's a sign that the MAF needs replacement. Neglecting this maintenance can lead to decreased fuel economy, as excessive fuel is injected into the engine without being efficiently burned. Opting for a genuine BMW replacement ensures stock-quality performance, offering your vehicle an efficiency boost.
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Genuine BMW Rubber Ring - 13711747985 - E34,E38,E39,E53,E60 M5,E63 M6...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:7309
Part#: 13711747985
Ships in 1 Business Day
$ 7.99 USD
Free Shipping on orders $49 and up


Genuine BMW Rubber Ring
This item fits the following BMW Chassis:
E60 M5,E63 M6,E34,E38,E39,E53 X5 X5,E63,E65

Fits BMW Engines including:
M60,M62,N62,S85

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HFM/Mass Air Sensor - E36 325i 1992, E34 525i 91-92
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Genuine BMW - Corporate Logo
T#:384204
Part#: 13627527518KT
Ships in 7 Business Days
$ 2,229.99 USD
Free Shipping on orders $49 and up

Replacement mass air sensor (HFM) for BMW 325i 1992, 525i 1991-1992 with M50 engine. The M50 engines in the E36 and E34 have a notorious fault for hesitation and sluggish response. If this is your situation the MAF should be on your list to check. The HFM is easy to replace and could cure a variety of problems. We also sell HFM sensor cleaner that may clear your problem (see below). Replaces part number 13621466359 / 0986280116.

Price includes $300.00 core harge.

This item fits the following BMWs:
1992 E36 BMW 325i 325is
1991-1992 E34 BMW 525i

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