Turbocharger BMW E90 E91 LCI 316d 318d N47N Diesel Turbo Charger 7812321

The BMW E90 E91 LCI 316d 318d N47N Turbo Turbocharger 7812321 is an original, used turbocharger from the Turbochargers & Parts category, designed for BMW 3 Series diesel engines after the facelift. It's a solution for users who want to restore proper boost, stable power, and correct engine performance without investing in a new component.

Specifications and technical data

• SKU: 8506722-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506722
• Substitutable numbers: 11658506722, 8506722, 7812321
• Fuel type: Diesel
• Category: Turbos & Parts

Intended use and compatibility with the N47N engine

The turbocharger presented here is designed to fit the N47N series diesel engines used in the BMW E90 and E91 facelift (LCI) models in 316d and 318d versions. This means maintaining the factory boost characteristics appropriate for these power configurations and engine control unit software.

By preserving the original geometry and mounting points, installation in place of the worn turbocharger is straightforward, with no need for modifications to the intake or exhaust system. This is particularly important in modern diesel engines, where proper tuning of the turbocharger to the control system is crucial for the durability and smooth operation of the engine.

Technical characteristics of the turbocharger for BMW E90/E91 LCI

As an original BMW component, the turbocharger maintains factory operating parameters, which translates into:

• correct response to gas throughout the entire rev range,
• stable boost pressure in line with the controller maps,
• consistent cooperation with the injection and exhaust gas recirculation system in the diesel engine,
• maintaining factory torque and power values (with functional accessories).

Dedicated to a diesel-powered engine, it provides adequate resistance to thermal and pressure loads typical of modern BMW diesel engines.

Condition, origin and advantages of using a used part

The turbocharger is offered as a used part, which represents a reasonable compromise between repair cost and maintaining the original manufacturer's specifications. In practice, this means:

• factory fit to the exhaust, intake and charge air cooling systems,
• no need to adapt mountings or oil lines,
• the possibility of economical repair of the supercharging system while maintaining the original design.

Before installation, standard service procedures are recommended: checking the oil lines for blockage, checking the intake system for leaks, and assessing the condition of the air filter. This approach extends the life of the turbocharger and reduces the risk of recurring failures.

Benefits of installing an original BMW turbocharger

Using an original equipment turbocharger in the BMW E90/E91 LCI 316d/318d N47N maintains the integrity of the entire drivetrain. Compared to aftermarket parts, the user benefits from:

• factory adjustment to the engine control software,
• predictable behavior of the car when accelerating and on the road,
• maintaining the design combustion characteristics typical of BMW diesel engines,
• less risk of problems with electronic diagnostics after replacement.

This solution is particularly attractive for owners who want to keep their car in a configuration close to factory specifications while optimizing service costs.

BMW turbochargers – selection and further development of the system

If you're looking for other turbochargers designed for BMW vehicles, check out our BMW turbochargers category, where you'll find a wide selection of solutions for various models and generations. This allows you to choose the perfect component for your specific engine configuration and vehicle year.

For owners of cars from the 1998–2012 model year, including the BMW 3 Series, we also recommend the guide article “The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model year” , which describes practical scenarios for modernizing and maintaining cars using proven used parts, such as turbochargers, engine accessories or drive system components.