BRAND NEW *OEM Quality* mass airflow sensor to suit BMW 3 Series E90 E91 E92 E93 320i 323i 325i and 330i.

If your E90 has started idling rough, hesitating off the lights or throwing lean codes, a tired MAF is one of the most common causes on the N52. This direct fit insert restores accurate air metering and is shipped via Australia Post Express from Melbourne.

TO SUIT

Fits the E90 sedan, E91 Touring, E92 coupe and E93 convertible from late 2004 to 2012 - 323i, 325i and 330i with the N52 six-cylinder, plus the early E90 320i 2.0L N46. Model-by-model dates are in the compatibility table.

FITMENT CHECK

Not listed for the N53 direct-injection engine fitted to some 2007-on 330i - check the number on your existing sensor. Insert only, fits your original housing. Match OEM 13627520519 or 7520519 before ordering.

OEM PART NUMBERS

13627520519
7520519
5WK97502

OTHER PART NUMBERS

V20-72-5141
8ET 009 142-641
EPP-BM-015
5WK97502Z
7.07759.71.0
AF10446
245-1188

PACKAGE INCLUDES

1 x BRAND NEW mass airflow sensor - insert only with seal ring, 5-pin connector and integrated air temperature sensor, 12V. Fits your original MAF housing.

ABOUT THIS SENSOR

On the N52 the MAF works with the Valvetronic system to meter air at very small throttle openings, so even slight drift shows up as an uneven idle and hesitation at low speed. Lean codes on both banks are the classic sign.

Replacing the sensor is a common fix for E90 owners chasing a persistent P0171 after vacuum leaks have been ruled out. Low return rate and backed by our returns policy.

COMMON SYMPTOMS OF FAILURE

Check engine light - fault codes P0100 P0101 P0102 P0103 (MAF circuit)
Lean codes P0171 and P0174 on both banks
Uneven idle at the lights
Hesitation at low speed
Stalling when coming to a stop
Increased fuel consumption

[12/04 - 08/07] BMW 3 E90 320i 2.0L 4cyl N46 B20 B 110kW
[09/05 - 02/07] BMW 3 E90 323i 2.5L 6cyl N52 B25 A / N52 B25 B / N52 B25 BF / N52 B25 BE 130kW
[03/07 - 12/11] BMW 3 E90 323i 2.5L 6cyl N52 B25 A / N52 B25 BF 140kW
[12/04 - 12/11] BMW 3 E90 325i 2.5L 6cyl N52 B25 A / N52 B25 B / N52 B25 BF 160kW
[12/04 - 10/11] BMW 3 E90 330i 3.0L 6cyl N52 B30 BF / N52 B30 A 190kW
[04/06 - 06/07] BMW 3 E91 323i 2.5L 6cyl N52 B25 A 130kW
[09/06 - 12/12] BMW 3 E91 323i 2.5L 6cyl N52 B25 A 140kW
[12/04 - 08/08] BMW 3 E91 325i 2.5L 6cyl N52 B25 A 160kW
[08/05 - 08/07] BMW 3 E91 330i 3.0L 6cyl N52 B30 A 190kW
[04/06 - 02/12] BMW 3 E92 323i 2.5L 6cyl N52 B25 AE / N52 B25 BE 140kW
[06/06 - 02/10] BMW 3 E92 325i 2.5L 6cyl N52 B25 A / N52 B25 AF / N52 B25 BF 160kW
[12/06 - 02/10] BMW 3 E93 325i 2.5L 6cyl N52 B25 A 160kW

Can I clean my MAF sensor instead of replacing it?

Yes - if the sensor is contaminated rather than electrically failed, cleaning with a dedicated MAF sensor cleaner spray can restore correct readings. Do not use brake cleaner or generic electrical contact cleaner as these leave residue that damages the sensing wire. Allow the sensor to dry completely before reinstalling. If cleaning does not resolve the fault codes, the sensor requires replacement.

What is the difference between a MAF sensor and a MAP sensor?

A MAF (Mass Air Flow) sensor directly measures the mass of air entering the engine using a hot wire element in the intake. A MAP (Manifold Absolute Pressure) sensor measures intake manifold pressure to calculate air density. Most modern engines use one or the other - some use both. Your vehicle service manual or OBD2 fault codes will confirm which sensor type your engine uses.

Will a faulty MAF sensor cause my vehicle to fail an emissions test?

Yes. A faulty MAF sensor causes the ECU to miscalculate fuel delivery, typically resulting in a rich running condition that increases CO and hydrocarbon emissions. Most roadworthy and emissions checks will fail a vehicle with an active MAF sensor fault code or visibly excessive exhaust smoke.

What are the symptoms of a bad MAF sensor?

Common symptoms include rough idle, hesitation or stumbling on acceleration, poor fuel economy, black smoke from the exhaust, and an illuminated Check Engine light. Your ECU may log fault codes P0100 to P0104.

Can I drive with a faulty MAF sensor?

You can drive short distances but it is not recommended. A faulty MAF sensor causes the ECU to run incorrect fuel mixtures, which can damage the catalytic converter and O2 sensors over time. Have it replaced as soon as possible.

How do I test if my MAF sensor is bad?

Use an OBD2 scanner to check for fault codes P0100-P0104. You can also use a multimeter or live data scanner to check the sensor output voltage against your vehicle's specification. A reading significantly outside spec confirms a faulty sensor.

What causes a MAF sensor to fail?

The most common causes are a dirty or contaminated sensing element (often from a missing or damaged air filter), oil contamination from an over-oiled aftermarket air filter, heat damage, or general wear over time.

Do I need to reset my ECU after replacing the MAF sensor?

It is good practice to clear any stored fault codes using an OBD2 scanner after replacement. Some vehicles will self-adapt within a short drive cycle, but clearing codes ensures the ECU recalibrates from a clean baseline.

Identification
Brand	Aftermarket OEM Replacement
Part Numbers
Part Number	SAM97502NG
Reference OEM Number	13627520519
Other OEM Numbers	7520519, 13627520519, 5WK97502
Related Part Numbers	5WK97502Z, AF10446, AM97502N, TAF022, MAS0286, AM97502NG
Interchange Part Numbers	V20-72-5141, 8ET 009 142-641, EPP-BM-015
Product Specifics
Product Type	SENSOR
Sensor Type	Mass Airflow Sensor
Number of pins	5
Connector Shape	oval
Voltage	12 V
Housing Colour	Black
Housing Type	without housing
Mounting Type	Bolted
Compatible Makes	BMW
Fitment Type	Direct Replacement
Outer Diameter	33 mm
Other Details
Note	Insert only with seal ring - fits your original MAF housing