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BMW E64 Mass Air Sensor & Air Flow Meters

BMW E64 Mass Air Sensor & Air Flow Meters 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.
You're currently viewing parts for your (E64) 6-Series Convertible 2004-2010. Reset your chassis
For accurate results, specify your model below.
Mass Air Flow Sensor (MAF) This is the replacement mass air sensor to fit the N62 engine used in the E60 545i, E63 645ci, E65 745i/Li, and E53 X5 4.4i/4.8is. This HFM is manufactured by OEM supplier Bosch and is a direct replacement for the stock HFM. When the HFM goes bad there should be a fault code and check engine light. In addition, your fuel economy will usually go down as the computer is no longer getting a good signal of airflow and the safest thing for the computer to do is add fuel. Replacement is straight-forward and easy with simple hand tools.

This item fits the following BMWs:
2004-2005 E60 BMW 545i
2004-2005 E63 BMW 645ci
2002-2005 E65 BMW 745i 745li
2004-2006 E53 BMW X5 4.4i X5 4.8is
Part #: 13627566988
Price: $139.95 (USD) 
Quantity:   
OEM Bosch HFM/Mass Air Sensor for E46 M3, E60 M5, E63 M6, MZ3-S54, MZ4 Replacement mass air sensor (HFM) for E46 M3 MZ3 with S54 engine, MZ4, E60 M5, E63 M6 with S85 engine.

This item fits the following BMWs:
2001-2006 E46 BMW M3
2006-2010 E60 BMW M5
2006+ E63 BMW M6
2001-2002 Z3 BMW M Roadster M Coupe with S54 engine
2003-2008 Z4 BMW Z4 M Roadster Z4 M Coupe
Part #: 13627839014
Price: $99.95 (USD) 
Quantity:   
Turner Plug-and-Play IAT Relocation Kit

If you've ever noticed your car feeling a bit sluggish after a few laps around the track, some hard driving, or even sitting in traffic on a hot day you may have been a victim of power loss due to heat soak.  All vehicles will lose some degree of performance due to heat soak under the right operating conditions.  The engine management system is constantly monitoring operating conditions and modifying parameters based on sensor inputs.  The problem is that BMW integrated the intake air temp sensor in the MAF housing, and often the MAF is sandwiched behind a hot radiator and in some applications next to an even hotter valve cover.  This is fine for overall simplicity and cost of the original engine management system, but less than ideal for optimal performance.  The MAF housing absorbs the excess heat from its surroundings and can’t shed it fast enough, and the ECU reads a falsely high intake air temperature.  It then incorrectly adjusts operating parameters to compensate for the false hot air measurement (pulling timing and running a leaner fuel mixture), and torque output drops like a rock.

The fix?  Locate an intake air temp sensor in a location where it can more accurately measure incoming air temps and where it is less prone to heat soak.  By mounting a sensor further away from the heat source and divorcing it from the mass of the MAF housing, it can both resist the effects of heat soak longer and respond to temperature changes more quickly.  The end result?  You’ll experience reduced loss in torque and more consistent power output when you’re pushing your engine hard. 

The Turner engineering team was initially skeptical of the claimed performance benefits of this modification.  We set out to first validate the functionality and performance benefit of a temp sensor relocation. We set out to replicate stop-and-go traffic heat soak in a 2001 540i in a controlled environment - our dynamometer. Four runs were performed with the dyno's cooling fans turned off to simulate heat soak like being stuck in traffic or low speeds, then the fans were turned on for three more runs to observe the recovery rate once air flow was reintroduced. This was done in stock configuration and then repeated with our sensor relocation kit. 

Result? We recovered 11lb-ft torque at 2500rpm by relocating the temperature sensor! This is a difference that can be felt behind the wheel - owners of M5s can expect an even larger recovery. Here are the heat soak-related torque losses we experienced: 

Stock IAT location Torque loss:
18rwtq at 2500rpm
10rwtq at 3000rpm
9rwtq at 3700rpm

Turner IAT Relocation Torque loss:
7rwtq at 2500rpm
5rwtq at 3000rpm
5rwtq at 3700rpm

Other “kits” on the market require you to cut and splice into your factory wiring harness. The Turner engineering team designed a complete plug and play kit that makes for quick, easy, and reversible installation. Original equipment weather-sealed connectors offer long term reliability, while sheathed wiring offers a clean appearance - you'll quickly forget it's under the hood. We found that different applications called for slightly different sensor positioning and cable routing, so our harness is nearly 3 feet long - long enough to provide flexibility in positioning, but not too long that you're left with unsightly excess wiring. We recommend positioning the sensor in a location away from engine heat, but still within the intake ducting (we found the far side of the airbox base to be a good home). Installation is as simple as drilling a small hole for the sensor and plugging in the harness.

We include everything you need to relocate your IAT - just select your desired sensor brand below (we recommend Beru).

Also the perfect plug-n-play option for anyone looking to upgrade their intake to utilize an Alpha-N tune!

Turner IAT Relocation Kit fits the following BMWs: 
1999-2001 E38 BMW 740i 740il
1999-2003 E39 BMW 540i M5* 
2006-2010 E6X BMW M5 M6*
2000-2003 E53 BMW X5 4.4i 4.6is
2001-2006 E46 BMW M3
2001-2002 MZ3 BMW M Coupe M Roadster
2006-2008 MZ4 BMW M Coupe M Roadster

*Despite the M5 having two MAF, temperature is only detected on the passenger side MAF, and therefore only one relocation is required.

Part #: 014579TMS
Price: $99.95 (USD) 
OEM VDO EVAP Pump Mass Air Flow Sensor -- M54 S85 E46 E90 E6X E84 E83 E53

This is a high quality replacement OEM VDO Mass Air Sensor for the EVAP system. Ensure everything stays in top shape and functionality by replacing your failed or aging MAF sensor.

OEM replacement for BMW part # 11721438814.

OEM VDO is one of the largest OE providers in the world, supplying numerous vehicle brands, including BMW, with many of their genuine parts that build the vehicle before they ever reach the car lot. Entrusted by many of the top names in automotives and with their proven history of reliability, it makes all of us here at Turner confident that their line of OEM replacement parts are a perfect option to restore your vehicles original operation and performance. The same great quality or higher than Genuine BMW parts at a lower cost.

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!

Part #: 11721438814
Price: $87.50 (USD) 
Quantity:   
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