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BorgWarner 53049880025 K04-025 Turbocharger Left Side RS4 Upgrade

Manufacturer

Picture for manufacturer Borg Warner

Part Number

53049880025
17 reviews
Sale Price

$1,291.63

In Stock (10+)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The BorgWarner 53049880025 is a K04-025 series turbocharger designed as a high-performance upgrade for Audi 2.7L bi-turbo applications. This is the left-side turbocharger in the twin-turbo configuration, engineered to support up to 380 horsepower output.

Key Features:

  • OEM-quality K04-025 turbocharger from BorgWarner
  • Designed for Audi RS4 V6 2.7L ASJ/AZR engines
  • Water-cooled bearing housing with floating journal bearings
  • Compressor wheel: 40mm inducer / 51mm exducer
  • Turbine wheel: 42mm inducer / 50mm exducer
  • High-temperature ductile iron turbine housing rated to 1292°F
  • Aluminum compressor housing with extended tip technology
  • High oxidation stability alloy turbine wheel rated to 1652°F

Application Notes:

This turbocharger is a direct upgrade for Audi RS4 and S4 2.7L bi-turbo engines. The K04-025 designation indicates left-side positioning. Professional installation is recommended, and upgraded fueling and ECU tuning are required to fully utilize the increased airflow capacity. Cross-reference OEM part numbers include 078145701M and 078145703M.

BorgWarner is a leading OE supplier known for precision-engineered turbochargers that meet the highest standards for quality, performance, and reliability. Each unit features carefully balanced rotating assemblies for smooth operation and long service life.

I called the same day to change my shipping to receive my part faster and was told no changes to my order could be made. The part was ordered on a Friday and was not shipped till Tuesday . I seriously don't understand why a change could not be even checked on. Just received a hard 'no changes' statement. I would say everything else was great with purchase.

love the price wow!!!! thank you guys for being around I just saved over 50 bucks!)

Ordering was easy. Hope shipping is quick and easy too!

I had never ordered off Autoplicity but I'm very happy I did crazy fast delivery time and great service overall, very pleased and will shop with again!

Reasonably priced and fairly accurate shipping date.

simple, easy. Thanks

Great!

very enjoyable!

Best price on the web. Very fast and easy. Thank you!

Easy to navigate website.

Super quick ordering No problems at all. Would do it again.

They shipped out next day from when I ordered my item. Cheapest price on my item but I havent recieved it to see the shipping time or condition.

Ordering was quick and easy. A lot of piece of mind being able to check out through Amazon. We'll see how the rest goes. (Shipment, correct product, customer service if needed, etc)

1st time customer. Hope to use again.

clear product description. Quick checkout process.

Quick and easy to purchase but took four days for the processing and to get shipped

good price fast shipping

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