BMW E6X M5/M6 Fuel Filter Kit - EAE Motorsports

Protect your injectors. Preserve your engine.

After over a decade of S85 ownership and witnessing far too many injector-related failures (many ending in catastrophic engine damage), we decided it was time to address a long-standing weak point in the fueling system. Yes, BMW included a factory filter in the tank—but clearly, it’s not enough. Even owners who replace their filters regularly still face costly failures.

The Problem

The S85’s single-stage filtration leaves injectors vulnerable to microscopic debris. Once clogged or damaged, injectors can misfire or fail completely, risking lean conditions and potential engine destruction.

The Solution

After consulting fuel system engineers and fuel injection specialists across Michigan, one thing became clear: the S85 needs post-pump filtration. The answer? A 10-micron inline fuel filter—small enough to catch harmful particles before they ever reach your injectors, yet free-flowing enough to maintain performance.

This isn’t a new idea—it’s a proven fix in other performance platforms. The 2009–2013 Corvette ZR1, which shares a similar single-filter design, relies on a post-pump auxiliary filter to prevent injector failures. We took the same approach but engineered it to work seamlessly with OEM S85 fuel lines.

Key Features:

✅ 10-Micron Filtration – Uses an easily accessible Earls filter element, widely available for quick replacement.

✅  Sensor Post Housing - Low-pressure sensor is now correctly placed after the filter, so your DME gets accurate fuel pressure readings

✅ OEM Fitment – Designed to work seamlessly with factory fuel lines, ensuring a secure fit and easy installation.

✅ Prevents Injector Sticking – Eliminates debris and contaminants that can cause stuck injectors and engine failure.

✅ Ethanol-Compatible – Unlike the factory filter, this system is designed to handle E10 and ethanol-blended fuels.

✅ Made in the USA – Precision-machined and manufactured to the highest standards for durability and performance.

✅ Easy DIY Installation – Designed for enthusiasts of all skill levels, with a plug-and-play setup.

Upgrade Right Away!

Many owners have experienced injector failures even after replacing the factory pre-pump filter. The stock system was never designed to ensure clean fuel reaches the injectors—only to protect the pump from large debris. This inline fuel filter kit is the missing piece to long-term fuel system reliability.

Protect your injectors. Protect your engine. Upgrade your fuel system today. 

S85 Fuel Filter Kit Installation Guide:

https://youtu.be/6wQaio8G9nw?feature=shared