This sensor basically measures the amount of air entering your engine. It doesn't just measure volume, though, it figures out the mass of the air. It does this using a tiny, heated wire – that’s the “hot – film” part. The more air flowing past it, the more the wire cools down. The sensor reads how much current it needs to keep that wire at a consistent temperature and translates that into how much air is actually coming in. It sends that information to the engine’s computer. The engine computer needs a really precise reading of airflow to figure out how much fuel to inject. Think of it like a recipe – you need the right amounts of ingredients. The air is a huge part of that “ingredient list”. This sensor tells the computer exactly how much air is there, so the computer can give the engine the right amount of fuel for optimal combustion. It’s part of the whole fuel injection system, really. If this sensor goes bad, your engine is going to run poorly. You’ll notice if it starts stumbling, especially when accelerating. You’ll probably get a check engine light, and potentially see a drop in fuel economy. A faulty sensor can cause the engine to run too rich (too much fuel) or too lean (not enough fuel), and that can eventually damage things like your catalytic converter. It acts like a shield protecting more expensive parts, in a way. You can usually find a replacement for a reasonable price these days. We stock a lot of them at Fixparts Online, and you can find a good selection of brands there, but generally, getting a quality sensor is key. It's one of those parts where saving a few bucks upfront can cost you more in the long run. We’re here to help: Hot-Film Mass Air Flow Sensor (MPN 0280217121) has a 12-month warranty!

About Bosch

Bosch is a global leader in automotive technology from Germany, celebrated for its innovative products and high-quality components. Based in Germany, Bosch drives advancements in vehicle safety and efficiency worldwide.

Why Choose Bosch?

• Bosch parts are known for being reliable and lasting a long time, which can save you money on repairs in the future. • They’re a leading supplier to car manufacturers, so you’re getting the same quality parts used in many new vehicles. • Bosch invests a lot in research and development, meaning their parts often have the latest technology for better performance. • You can find Bosch parts for a wide range of vehicles, from older models to the newest cars and trucks. Bosch delivers excellence, FixParts Online delivers to your door.