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Shopping for 2003-BMW-745i
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Air Flow Sensor

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Mass Air Flow Sensor
A-Premium®
Mass Air Flow Sensor for BMW 545i 645Ci 745i 745L X5 E60 E63 E65 2004-2005 4.4L
$84.99
Quantity Less than 3
Edit ZIP code
2-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
MaterialPlastic
ColorBlack
Part interchange
13627566988, 13627524136, MAS0413, 280218135, V20725207, 5S5604, 158-1670, 64-1825, 
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Mass Air Flow Sensor
A-Premium®
Mass Air Flow Sensor for BMW E65 745i E66 745Li 2002-2003 V8 4.4L
$52.99
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2-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
MaterialPlastic
ColorBlack
Part interchange
MAS0431, 13627501554, 280218077, 86459, 74-10166, 7410166
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Beck/Arnley 158-1670 Mass Air Flow Sensor
Beck/Arnley
Beck/Arnley 158-1670 Mass Air Flow Sensor
$153.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
Part interchange
158-1670
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Mass Air Flow Sensor - Delphi AF10523
Delphi
Mass Air Flow Sensor - Delphi AF10523
$354.99
Quantity Less than 2
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
ColorBlack
Part interchange
AF10523, 13 62 7 501 554, SU6449, MA1263, 74-10166, XTP410166, MF21246N, MAS0431, 
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Mass Air Flow Sensor - Delphi AF10526
Delphi
Mass Air Flow Sensor - Delphi AF10526
$243.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
ColorBlack
Part interchange
AF10526, 13 62 7 566 988, MA1245, 74-10129, XTP410129, MF21177N, MAS0413, MA437, 
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Standard MAS0431 Mass Air Flow Sensor
Standard
Standard MAS0431 Mass Air Flow Sensor
$149.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
Part interchange
MAS0431, 157-0317, 0280218077, AF10523, 2-14769, MG0172, MA485, MA1263, 
...View more
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Standard MAS0413 Mass Air Flow Sensor
Standard
Standard MAS0413 Mass Air Flow Sensor
$248.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
MaterialPlastic
Part interchange
MAS0413, 158-1670, 0280218135, AF10526, 2-14751, MG0167, MA437, MA1245, 
...View more
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Walker Products 245-2261 Mass Air Flow Sensor
Walker Products
Walker Products 245-2261 Mass Air Flow Sensor
$119.99
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3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
Part interchange
245-2261, 0280218077
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Walker Products 245-2262 Mass Air Flow Sensor
Walker Products
Walker Products 245-2262 Mass Air Flow Sensor
$141.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
ColorBlack
Part interchange
245-2262
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Walker Products 245-1262 Mass Air Flow Sensor
Walker Products
Walker Products 245-1262 Mass Air Flow Sensor
$171.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
Part interchange
245-1262, 641825, 64-1825, SU7107, 917-1018, 0280218135, MAS0413, 13627524136, 
...View more
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Walker Products 245-1261 Mass Air Flow Sensor
Walker Products
Walker Products 245-1261 Mass Air Flow Sensor
$133.99
Edit ZIP code
3-year warranty
90 days free return
Add Trim and Engine info to ensure a guaranteed fit
Vehicle: 2003 BMW 745i
Item LocatedUnited States
Quantity1
Part interchange
245-1261, 64-1793, 641793, SU6449, 917-1117, 0280218077, MAS0431, 7501554, 
...View more
Show less

Mass Air Flow Sensors From $26.99

4,848+ Applications | Free Shipping | 3-Year Warranty

Your engine needs the right air-fuel mixture to run smoothly, and that's where we come in. Our MAF sensors measure airflow with lab-grade accuracy, sending real-time data to your engine computer so you get maximum power and fuel economy. When yours starts acting up, you'll know it fast.

How to Tell If You Have a Faulty Mass Airflow Sensor

Your check engine light pops on first?usually with codes P0100 to P0104. But you'll feel the problems before you see the light. Rough idling hits you at stoplights as your engine shakes or stalls from incorrect air-fuel mixture. Step on the gas and your car hesitates or stumbles instead of accelerating smoothly.

A faulty mass air flow sensor typically causes your check engine light to come on since your ECU constantly monitors sensor inputs, triggering diagnostic trouble codes in the range of P0100 to P0104. Your fuel economy tanks too?we're talking 15-30% worse gas mileage because your engine runs too rich without accurate sensor readings.

Common MAF Sensor Failure Signs:

? Check engine light: Codes P0100-P0104 tell you the sensor circuit has problems

? Poor acceleration: Engine hesitates when you need power most

? Bad fuel economy: Fuel usage jumps 20-40% as your ECU defaults to rich mixture

? Hard starting: Takes multiple tries to crank the engine, especially when cold

? Black exhaust smoke: Dark smoke means your engine's burning way too much fuel

Mass Air Flow Sensor Replacement Cost

Dealerships charge $200-$500 for MAF sensor replacement?that's parts plus labor. You're paying $100-$350 just for the sensor itself. We sell the exact same quality sensors starting at $26.99, saving you serious cash. Breaking sensor wires requires replacement which can run upwards of $100, so our sensors use the same rugged construction as OEM parts.

Installation takes 15 minutes max. Disconnect your battery, unplug the electrical connector, remove two to four screws, and swap in the new sensor. That's it. You don't need special tools or mechanic skills?just basic hand tools you already own.

Why Choose Our MAF Sensors

We stock sensors for 4,848 different vehicles?cars, trucks, SUVs?basically everything on American roads. Each sensor features platinum or gold-plated elements that measure airflow within 2% accuracy across all temperatures. You get OEM-equivalent performance at a fraction of dealer prices.

Every sensor ships free and leaves our warehouse within 1 business day. We back everything with a 3-year warranty and 90-day free returns. If it doesn't fit or work perfectly, send it back?no questions asked. That's how confident we are in our parts.

Get Your Engine Running Right

MAF sensors for 4,848+ vehicles | Starting at $26.99

Order Now

Frequently Asked Questions

Can I clean my MAF sensor instead of replacing it?

You should clean your mass airflow sensor either every six months or every time you change your oil, cleaning it when you change your air filter saves time and money. Use only MAF sensor cleaner spray?never touch the sensor wires. If cleaning doesn't fix your issues, replacement is necessary.

How long do mass air flow sensors last?

At the ten-year point (80,000 to 150,000 miles), your vehicle will likely need a new sensor. Sensors don't need regular replacement like oil filters?only replace them when they fail or cause performance problems.

Will a bad MAF sensor damage my engine?

Yes. Running with a faulty MAF sensor causes your engine to run too rich, which dumps excess fuel into your exhaust system. This unburned fuel will destroy your catalytic converter?a $1,200-$2,500 repair. Replace the $27 sensor now to avoid thousand-dollar repairs later.

Do you have the right sensor for my car?

We stock MAF sensors for 4,848 vehicle applications from virtually every manufacturer. Enter your year, make, and model on our site and we'll show you the exact sensor your vehicle needs. All our sensors are guaranteed to fit or you get your money back.

What's your return policy if the sensor doesn't work?

We offer 90-day free returns, no questions asked. If the sensor doesn't fit, doesn't fix your problem, or you're not completely satisfied, send it back for a full refund. We also provide a 3-year warranty covering any defects.