BMW F20 F30 LCI M140i M240i 340i 440i B58 Turbocharger Manifold 7934605

The BMW F20 F30 LCI M140I M240I 340I 440I B58 Turbocharger Manifold 7934605 is an original turbocharger and parts component designed for modern B58 petrol engines. This used part allows for a cost-effective yet technically correct repair or replacement of the factory manifold in post-facelift BMW 1, 2, 3, and 4 Series sport models.

Specifications and technical data

• SKU: 7934605-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7934605
• Substitutable numbers: 7934605, 11657934605
• Fuel type: Petrol
• Part type: Turbocharger Manifold
• Category: Turbos & Parts

Purpose and role of the turbocharger manifold

The turbocharger manifold for the BMW F20, F30 LCI, M140i, M240i, 340i, and 440i with the B58 engine is a key component of the inline gasoline engine's turbocharging system. It precisely delivers exhaust gases to the turbine, ensuring stable boost pressure, correct throttle response, and predictable performance across the entire rev range.

In B58 engines, the manifold works with a twin-scroll turbocharger, therefore its geometry and quality of workmanship have a direct impact on:

• boost efficiency at low and medium revs,
• maintaining the appropriate exhaust gas temperature in the turbine area,
• even load on individual cylinders,
• stability of the unit's operation during dynamic driving.

Benefits of using the original BMW manifold

Choosing the original aftermarket manifold for the B58 engine allows you to maintain the factory operating parameters of the supercharger system. A component from the same model family guarantees:

• precise fit to the cylinder head and turbocharger without the need for modifications,
• maintaining the stock torque and power characteristics,
• proper cooperation with the factory engine controller,
• Possibility to use existing mounting points and accessories.

For users who are upgrading or servicing their B58 unit, using the original manifold is a safe solution in terms of durability and compatibility with other exhaust and supercharger components.

Used condition and assembly aspects

The manifold offered comes from a BMW vehicle and is classified as a used part . This means it may show signs of wear typical of components operating at high temperatures, while maintaining the functionality required for continued operation in the supercharging system.

Before installation, it is recommended to:

• checking the sealing surface for tightness,
• replacing the seals with new ones compatible with the given engine,
• checking the condition of threads and mounting points,
• visual assessment for any cracks or deformations.

A properly prepared manifold allows for efficient assembly in a workshop, without the need to modify the exhaust system or turbocharger.

Application in the B58 petrol engine

The B58 engine is a modern, turbocharged petrol engine whose exhaust and supercharger systems operate under high thermal and pressure loads. Using the right manifold is essential for:

• maintaining a stable operating temperature in the turbine area,
• reducing the risk of leaks and boost pressure drops,
• proper operation of exhaust emission control systems,
• maintaining the work culture characteristic of BMW B58 units.

Thanks to this solution, the user receives an element that is in line with the manufacturer's design assumptions and allows for further operation of the vehicle without compromising on dynamics and driving comfort.

Other BMW turbochargers and parts and knowledge about used components

If you're looking for other turbochargers and parts for BMW, check out our dedicated category: Turbochargers and Parts for BMW . There you'll find a wide selection of turbocharger components tailored to various BMW models.

When choosing aftermarket components, it's worth knowing the general rules for selecting and using used parts. This article, which explains when purchasing used components makes the most sense, how to assess their condition, and what to look for during installation, may be helpful. You can find more practical tips here: When are used VW parts a wise choice and how to choose them safely .

Summary

The BMW F20 F30 LCI M140I M240I 340I 440I B58 Turbocharger Manifold 7934605 is an original, used turbocharger component designed for the B58 petrol engines in BMW sport models. It ensures factory fit, compatibility with the engine design, and the possibility of economical exhaust and turbocharger repair while maintaining the proper operating characteristics of the engine.