Borg Warner Turbocharger Cartridge

BorgWarner Turbocharger Cartridges: Genuine OEM Quality at the Core

When a turbocharger begins to fail, the culprit is almost always found inside the turbocharger cartridge — more precisely known as the Center Housing Rotating Assembly, or CHRA. CHRA stands for "Center Housing Rotating Assembly" — the heart of any turbocharger. As BorgWarner themselves describe it, this is the center section of the turbo that includes all the bearings and seals that wear out during normal use. The compressor and turbine housings rarely need replacement, but the internal rotating assembly — with its precision bearings, seals, and shaft — takes the brunt of heat cycles, oil contamination, and high-speed stress over time.

BorgWarner is one of the few turbocharger manufacturers that both produces original equipment turbos for major automakers and offers genuine factory-remanufactured and new CHRA cartridges for the aftermarket. That distinction matters enormously when it comes to replacement quality. A genuine BorgWarner CHRA is built to the same tolerances and specifications as the unit that came on the vehicle from the factory — not an approximation of it.

BorgWarner CHRA Product Lines: S-Series, K-Series, and Beyond

BorgWarner's turbocharger cartridge catalog spans a wide range of platforms and industries. Key product lines represented in their CHRA offerings include:

• S-Series (S1B, S2B, S300, S400): The workhorse family of BorgWarner turbos, widely used in diesel applications including heavy trucks, agricultural equipment, and performance builds. The S300 and S400 lines in particular cover a massive range of commercial and high-output diesel engines, including Caterpillar applications.
• K-Series (K03, K16, K42): Compact turbos predominantly found in European passenger car platforms, including Volkswagen and Audi applications. The K03 CHRA, for example, serves several VW and Audi 2.0T engine families. The K-series is known for precise fitment in tight engine bays.

BorgWarner also produces genuine factory-remanufactured CHRAs, rebuilt using OEM tooling and OEM-spec parts. These are a cost-effective option for performance or commercial applications where exact fitment is non-negotiable. For instance, BorgWarner offers remanufactured CHRA cartridges specific to the Ford 6.4L Power Stroke diesel found in 2008–2010 Super Duty trucks.

What Makes BorgWarner CHRAs Stand Out

BorgWarner's legacy as an OEM turbocharger supplier to the world's largest engine manufacturers is the foundation of their CHRA quality. Every genuine BorgWarner cartridge is manufactured to exact OEM specifications, ensuring a direct, no-compromise replacement for the original part. This means proper shaft clearances, the right bearing configuration, and seals engineered for the thermal and mechanical demands of your specific application.

At the performance end of the spectrum, BorgWarner's EFR-series turbos showcase the brand's engineering depth. The EFR lineup features dual-row ceramic ball bearing cartridges that provide substantial friction reduction at low turbo speeds, improving spool response — a technology that flows directly from BorgWarner's racing and OEM R&D programs into their production units.

Replacing a CHRA rather than an entire turbocharger assembly is a proven cost-saving strategy for shops and enthusiasts alike — provided the compressor and turbine housings are undamaged. The turbo's outer housings are not wear items in normal use, making a genuine BorgWarner CHRA cartridge the most precise, economical path to restoring full turbo function. Professional installation is recommended, as proper assembly and pre-oiling procedures are critical to long service life.

Browse the full selection of BorgWarner Turbocharger Cartridges to find the exact CHRA for your application, or explore the complete BorgWarner brand catalog for the full range of boosting components and turbocharger assemblies.