Best Reliability Modification for a 2022+ Subaru VB WRX

So you own a 2022+ Subaru WRX VB with an FA24 engine and you're worried about reliability...we are here to help! We will cover the best reliability mod for your WRX but we first need to dispel the bad rumors about Subaru's. You may have heard horror stories from owners of the older Subaru WRX platforms, don't listen to them. Some past Subaru owners have tried to give the WRX & STi a bad name after blowing them up due to a LACK of knowledge, care, proper mods, & tuning. You can't just throw a bunch of mods on your WRX without a tune...that is the cause of most failures. A simple cold air intake requires a tune!

With that said, the Subaru FA24 engine is big upgrade from the FA20 and is extremely solid if maintained properly. When modded & tuned correctly, it can handle a lot more power reliably. In stock form, the FA24 engine is under-rated from the factory so you have a very strong engine in you WRX.

If you have not already purchased an AOS for your WRX, you're going to want to grab one asap! The biggest problem with the direct injection Subaru FA24 engine is blow by and oil vapor build up. With any turbo Subaru or turbo vehicle in general, blow by is usually an issue because of the higher crankcase pressure turbo's create. Without having an AOS installed, your engine may burn oil, have higher knock levels, and unnecessary carbon build up. Solving this problem is a must for a stock or modded Subaru WRX.

Benefits of an Air Oil Separator (AOS)

The cure for a WRX FA24 engine is an AOS - short for air oil separator. This is similar to a catch can but this maintenance free system will return the separated oil back to the engine and keep oil out of your intake charge. There is no need to drain it like a catch can requires you to do. This will reduce knock levels, prevent carbon build up, reduce oil consumption, and maintain your octane. A well designed AOS is hooked up to your engines coolant system to prevent them from freezing. This allows you to use an AOS year round in any location.

Brand Recommendations

We recommend purchasing an IAG Performance AOS as they offer the best designed AOS system.

2022+ WRX FA24 VB - AOS Recommended Product List

Below we have links to our store for the current recommended AOS options for your Subaru WRX. IAG Performance has 3 different colors available.

IAG Performance Red Air Oil Separator AOS for a Subaru 2022+ WRX FA24

IAG Performance Black Air Oil Separator AOS for a Subaru 2022+ WRX FA24

IAG Performance Neon Air Oil Separator Yellow AOS for a Subaru 2022+ WRX FA24