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YOU ARE BUYING 
BRAND: ISUMO  
Aftermarket Premium High Quality
Mass Air Flow Sensor (MAF)
Quantity: 1
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Part#
MAS5408/2
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Descriptions:
Connector Gender Female
Connector Quantity 1
Connector Shape Rectangular
Notes Complete Assembly
Terminal Gender Male
Terminal Quantity 4
Terminal Type Blade
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Cross-Reference
F5OY12B579A, 
F65Z12B579AA, 
F8LZ12B579AA, 
F8LZ12B579AARM, 
XC2Z12B579AA 
MAF1861 
2451039 
245-1039
MAF1039
The Mass Air Flow (MAF) sensor is located in the air duct between the air cleaner 
and the engines air intake. Location may be mounted to the throttle body or in the air cleaner 
housing.
The MASS Air Flow sensor is a computer input that measures the amount of air entering the engine. Barometric pressure may also be calculated either in the sensor or by the computer for correct air/fuel mixture. The computer uses this information for air/fuel mixture control, ignition timing and to aid the transmission in pressure control for accurate shifting. 
Failure Symptoms: Malfunction Indicator Light  illumination, failed emission test, engine hesitation on acceleration, poor fuel economy, poor engine performance, 
engine no start condition, engine surging
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Returns & Warranty Policy

30-Day Returns

Returns are accepted within 30 days of the purchase date, in line with our eBay return policy.

Warranty After 30 Days

  • ISUMO® parts: 30-day returns, plus warranty replacement up to 90 days from the purchase date (exchange for the same item).
  • Other brands: after the 30-day return period, the part is covered by its manufacturer's warranty. Warranty terms differ by brand, so please check the manufacturer's website or contact them directly.
  • For warranty replacements, the buyer is responsible for return shipping and the cost of shipping the replacement.
  • Proof of purchase date is required.
  • Please message us before sending an item back so we can confirm the shipping cost.

What the Warranty Covers

Failures caused by defects in materials or manufacturing. It does not cover normal wear and tear, cosmetic damage, or improper installation.

Any alteration, modification or tampering with the item voids the warranty and the right to return it. Altered items are not eligible for any credit.

Before You Return an Item

  • Please message us first, before sending the item back or opening a return request, with a clear description of the issue and photos showing the problem.
  • Please allow us up to a maximum of 2 business days to respond. Most of the time we reply much sooner, and every message is answered by a real person on our team, not a bot. Our business hours are Monday to Friday, 10:00 AM – 5:00 PM Pacific Time (PST).

Local Pickup

If you chose local pickup, please wait for our email or eBay message confirming that your order is ready for pickup before coming in. Pickup is available during business hours, Monday to Friday, 10:00 AM – 5:00 PM (PST).

Return Condition

Items must be returned in their original packaging and in good condition. Please include a dated photo of the item when you ship it back.

Please double-check that you are returning the same brand-new part we sent you. When replacing a part, it is easy to mix up our new part with the old one removed from your vehicle. Returned items are inspected and matched to our part, so old, used or different parts returned in place of ours are not eligible for any credit or refund.

Questions? Message us through eBay. We're happy to help.