The BMW 328d xDrive is a rare and unique model – exclusive to the US market and powered by the efficient yet powerful N47D20A engine. While Europe enjoyed a variety of diesel BMWs, the 328d was the only US-spec diesel of its era, making it a true standout. For this reason, performance upgrades tailored specifically for this car are hard to come by.

That’s where MuchBoost steps in. Our custom-engineered turbocharger is based on an original Garrett unit, rebuilt with performance in mind, and designed for 100% plug-and-play installation. Unlike generic upgrades, this turbo was developed with the 328d xDrive, and X3 28dX US Spec in focus, ensuring perfect fitment and maximum reliability.

With our upgraded billet compressor wheel, enlarged turbine wheel (optional), and precision-machined housings, this turbo can deliver up to 155% more power than stock—unlocking between 240 HP and 280 HP at the crank. That’s up to 100 extra horsepower, turning your 328d into a daily driver that combines BMW luxury, diesel torque, and serious performance.

MuchBoost N47D20A 240

Upgraded turbocharger with an estimated ~240HP at the crank. List of modifications:

• Upgraded journal bearings system that allows the turbo to hold more boost,
• Genuine Hella electronic actuator
• More efficient and larger Billet Compressor Wheel 6+6 Blades,
• Precisely machined seal plates and compressor housing,
• Genuine Garrett compressor housing,
• Genuine Garrett bearing housing,
• Genuine Garrett exhaust manifold,
• Original Honeywell actuator,
• Dynamically balanced,
• Perfectly calibrated VNT system + dynamically balanced. We use a modern VISCOM flow bench and Schenck balancing machines,
• The compressor and turbine wheels are balanced separately, and then the whole core is high-speed balanced using VSR balancing machines at speeds similar to the level seen in the vehicle.

MuchBoost N47D20A 280

Upgraded turbocharger with an estimated potential of ~280HP at the crank. Modifications compared to the 240 option are the same except:

• Enlarged Turbine Wheel,
• Precisely machined exhaust housing.

Other significant modifications

The turbo is meant to work with ~240-280HP In order to reach that level of power, you need to adjust your fuel, exhaust, and cooling systems as well.

A set of gaskets is included with every option you choose!

(If your engine has a different code, please send us a message. We will verify it.)

Matters you should be aware of when placing your order.

1. 1. The warranty is 12 months without the limit of mileage.
   2. We need around 2 weeks to perform and ship the upgraded turbocharger. In some complicated cases, it may take up to 3 weeks. Please realize that the turbo upgrades require precision. Especially, the machining process takes a lot of time. We don`t cut the corners. Thank you for understanding. The parcels in the European Union are shipped via DPD for just 25,00 EURO. UPS is used for orders besides the EU, it costs 99,00 EURO and 49,00 to the UK (DHL). The average delivery time is 3-5 working days.
   3. Every parcel is fully insured.
   4. If you didn`t find the turbo you need, feel free to contact us. We are able to perform many more upgraded turbochargers than you can find on the site. Our development department works permanently on the new models.
   5. Do you have a workshop, are you an influencer or seller of tuning parts? We are open to cooperation by offering discounts and refunds.
   6. During placing your order, please provide information as follows:

• • the engine code,
  • the car model,
  • the stock power,
  • the VIN number

These details are helpful to make the turbo correctly.