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Which brand of MAF sensor should I use as a replacement?

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I would not recommend purchasing Ridex MAF since inexpensive components often have reliability problems.
Adhere to the original specifications provided by the manufacturer.
Remember to reset adaptations after changing components such as the Mass Air Flow (MAF) sensor.

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Only Bosch, Siemens, and Febi (Bosch/Siemens with the logos removed) are of sufficient quality to be installed. The Chinese products sold on Ebay are of poor quality, and even the supposedly reputable brands like Bremi and Hella are not much better.

I installed a VDO Mass Air Flow (MAF) sensor on an Audi A4, however it resulted in a deterioration in performance compared to the previous state, and it also triggered the Engine Malfunction Light (EML) to illuminate.

Simply purchase the authentic product.

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It is often convenient to attribute the issue to the MAF (Mass Air Flow) sensor when other causes or sensor malfunctions are involved.
To narrow down the possible causes, you might consider using an inexpensive Ridex MAF (Mass Air Flow) sensor instead of the original one. This alternative option is far less expensive and can be used to see whether it fixes the issue.
If the replacement does not resolve the issue, it means that you have not only wasted a significant amount of money on an original item, but also discovered that the problem is elsewhere, resulting in MAF deviation.
Malfunctions in the Exhaust Gas Recirculation (EGR) system and air leaks in the induction system may have a negative impact on the functioning of the Mass Air Flow (MAF) sensor and result in the occurrence of false MAF failures.
If you lack the necessary software to reset adaptations, driving at various speeds over a duration of time will automatically reset the Digital Diesel Electronics (DDE) system.
It should be noted that authentic Bosch MAFs with holographic labels are branded as "made in Germany," but are really manufactured in China under a licencing agreement.

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