Mass air flow sensor (MAF)

The mass air flow sensor (commonly called the MAF sensor or air flow meter) sits in the intake tract between the air filter and the throttle body, measuring how much air is entering the engine so the ECU knows how much fuel to inject.Most modern engines use one of two designs: hot-wire MAF sensors, which read the cooling effect of incoming air on a heated wire, and hot-film sensors, which work on the same principle but use a thin film element. Older vehicles sometimes still run vane-meter sensors.A dirty or faulty MAF sensor throws off the air-fuel mixture, which leads to misfires, poor economy, and over time damages the catalytic converter and lambda sensors, so symptoms are worth catching early. Common warning signs:A check engine light, often with codes in the P0100-P0104 range

• Rough idle that won't smooth out
• Hesitation or stalling under acceleration
• Black smoke from the exhaust on diesel engines
• Fuel economy dropping noticeably
• Trouble starting in cold weather
• The engine cutting into limp mode

Tracking down a like-for-like used mass air flow sensor online means digging through breaker yards, electronics specialists, and parts marketplaces with very different prices. Parthunt24 brings used MAF sensor listings together from marketplaces like eBay, Opisto, Ovoko, RicambiPro, ProxyParts, Ecooparts, Autoparts24 and TotalParts. Compare 1007 options on price, condition, and fitment, then head to the marketplace once you've found the right sensor.

A mass airflow sensor (MAF) measures the mass flow rate of air entering a fuel-injected internal combustion engine, which is essential for the engine control unit (ECU) to balance and deliver the correct amount of fuel. There are two common types of MAF sensors: vane meter sensors and hot wire sensors.The OEM part number is the starting point, followed by the sensor type (hot-wire vs hot-film), connector shape, housing diameter, and whether the listing is a bare sensor insert or a complete sensor-and-housing assembly. A sensor that bolts up but uses a different calibration curve will throw fuelling out from day one.Set your make and model in the Parthunt24 filter panel to focus the results on fitting sensors. Each listing opens on the marketplace handling the sale, where you can review the seller's full breakdown and complete the order on their page.

• Vehicle compatibility: Match the make, model, year, engine code, and OEM part number.
• Petrol vs diesel compatibility: MAF sensors differ between petrol and diesel engines.
• Sensor type: Check whether the vehicle uses a hot-wire or hot-film MAF sensor.
• Housing compatibility: Some sensors include the housing, while others are sold as sensor-only inserts.
• Connector type: Verify the plug shape and pin configuration.
• Air intake diameter: The housing diameter must match the intake system.
• ECU calibration compatibility: Incorrect calibration can affect fuelling and engine performance.
• Integrated intake air temperature sensor: Some MAF sensors include an integrated IAT sensor.
• OEM vs aftermarket specification: Low-quality sensors may provide inaccurate readings.
• Turbocharged engine compatibility: Turbocharged engines may require different airflow ranges.
• Mounting points: Verify the screw pattern and sensor orientation.
• Condition: Inspect for contamination, a damaged sensor wire, oil residue, or a cracked housing.

Once you're redirected to the original listing, make sure to read through the details carefully before buying. A worn or contaminated MAF sensor will look identical to a healthy one in a thumbnail, since the wire or film element is tiny and tucked inside the housing, so testing notes and close-ups of the element matter more than they do on most parts.

• Photos: Clear shots of the sensor body, element, connector, and housing.
• Seller reputation: Buyer feedback, sales history, and review quality.
• Compatibility: OEM number checked against your engine code.
• Included components: Bare sensor, full housing, or with IAT sensor integrated?
• Condition: Element contamination, oil residue, damaged wire, cracked housing.
• Testing: Notes confirming the sensor was reading correctly when removed.
• Warranty and returns: A clear path if the sensor arrives off-spec or faulty.
• Shipping: Protective packaging for delicate sensor elements.
• Documentation: Donor history and proof of removal.

If everything’s in order, click through to the seller’s marketplace and make the purchase.

What you'll pay for a MAF sensor depends on the vehicle, the sensor design, and whether the housing is included. Used bare hot-wire sensors from common petrol engines open at €15-€40, hot-film sensors with full housing assemblies sit at €50-€120, and OEM Bosch sensors for premium diesels or turbocharged engines push past €180.Browsing Parthunt24, MAF sensors for sale begin from as low as 5.00. Factors that move mass air flow sensor price up or down:

• Inclusions: Bare sensor sits below sensor-plus-housing, which sits below integrated MAF/IAT units.
• Brand: OEM and Bosch sit at the top of the range; quality aftermarket sits below.
• Engine type: Turbocharged diesel sensors generally cost more than naturally aspirated petrol units.
• Engine rarity: Common engines are cheaper; specialist applications cost more.
• Condition: Bench-tested sensors command a premium over as-removed pulls.

On Parthunt24, MAF sensor listings sit on one page so the lowest MAF price across sellers is easy to spot.

A MAF sensor rarely fails in isolation, and the wider engine management system depends on accurate input from several sensors at once. A bad signal from a neighbouring sensor can produce identical symptoms to a failed MAF, so the wider sensor array is worth checking before fitting a replacement. Browse these on Parthunt24 alongside the MAF:

• MAP sensor: Often tested alongside the MAF for fuelling faults.
• Oxygen sensor: Lean or rich running blamed on the MAF is sometimes lambda trouble.
• Throttle position sensor: Inconsistent readings cause hesitation that mimics MAF faults.
• Engine coolant temperature sensor: Bad readings cause rich running that fouls the MAF.
• Knock sensor: Worth checking on petrol engines with hesitation issues.
• IAT sensor: Sometimes integrated with the MAF; replace as a pair where bundled.
• Air filter: A clogged filter contaminates the MAF and shortens its life.
• Intake hose: Cracks here let in unmetered air and produce MAF-style symptoms.

A MAF sensor search shouldn't burn through an evening. Parthunt24 pulls listings from across the major used-parts marketplaces onto one filterable page, with prices, condition notes, and donor details all visible together.Hot-wire, hot-film, and integrated MAF/IAT sensors across most marques on European roads sit in the same results, including units from Bosch and other reputable manufacturers. One search, one shortlist, and the right sensor at the lowest MAF price within minutes. Compare prices, find the best deal, and buy a MAF for your car through Parthunt24 today.