BMW 1 3 Series E81 E87 LCI E90 E91 Turbo Charger 118d 318d N47 143HP 4731637

BMW 1 3 Series E81 E87 LCI E90 E91 Turbo Charger is an original turbocharging system component from the Compressors and parts group, designed for BMW N47 diesel engines in popular compact and mid-size models. The turbocharger ensures proper boost pressure, stable torque characteristics, and predictable throttle response, which translates into efficient and economical engine operation. This is a solution for users who want to maintain the factory engine performance characteristics and avoid problems typical of random aftermarket replacements.

Specifications and technical data

• SKU: 4731637
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 4731637
• Substitutable numbers: 11657800595, 7800595, 4731637

Purpose and role in the turbocharging system

The presented turbocharger is a component of the turbocharging system used in N47 engines fitted in BMW 1 and 3 Series models, such as the 116d, 118d, and 318d versions. It is responsible for compressing the air drawn into the cylinders, which allows for achieving the appropriate power and flexibility while maintaining reasonable fuel consumption. Using an original component from the Compressors and parts group helps maintain the correct operating parameters of the engine and reduces the risk of improper fitment.

Benefits of using an original BMW turbocharger

Choosing a turbocharger sourced from BMW means maintaining compliance with the engine's factory design specifications. Properly selected rotor geometry, exhaust flow characteristics, and compatibility with the engine control unit translate into:

• stable boost pressure build-up across the entire rev range,
• predictable load response and smooth acceleration,
• reduced risk of ECU errors resulting from incorrect part selection,
• maintaining engine refinement close to the factory configuration.

For many users, it is also important that using an original component can facilitate subsequent diagnostics and service, as the turbocharger's operating parameters are known and predictable for workshops specializing in the BMW brand.

Condition, fitment, and installation aspects

The offered turbocharger is a used component, which allows for an economical repair of the turbocharging system while maintaining the manufacturer's original specifications. Before installation, a standard workshop procedure is recommended: inspection of the lubrication system, oil lines, and intake hoses, as well as verification of any contamination in the intake and exhaust systems. Correct installation and initial start-up, following the bleeding and oil priming procedure, are crucial for the durability of the component.

Why choose original BMW Compressors and parts

In the case of turbochargers and turbocharging components, it is particularly important to maintain compliance with factory parameters. Original BMW components from the Compressors and parts category are designed for specific engines, which minimizes the risk of installation problems, leaks, or incorrect engine control unit operation. For the user, this means greater operational predictability and the ability to maintain driving characteristics close to those the car offered when it left the factory.

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other components from the same group, such as turbochargers, compressors, or additional turbocharging parts, check out the available parts in the BMW Compressors and parts category.

Original used parts vs. car character and vehicle value

Using original, used components in premium cars allows for maintaining structural consistency and driving character, which is particularly important for brands such as BMW or Audi. If you are interested in how original components influence the preservation of the manufacturer's DNA and the quality of the driving experience, it is worth reading the article Audi and emotions in their purest form – how used parts help maintain the brand's DNA, which discusses this topic using the example of another premium segment brand.

For drivers thinking long-term about their car, information on how the selection of original used components affects the subsequent resale of the vehicle may also be useful – this is described in more detail in the material on the impact of original used parts on the price when selling a car, which helps in making more informed service decisions.