CTS B-Cool DSG Oil Filter Housing for MK7.5 Golf R and Audi S3/RS3 (8V.2), Audi TTRS (8S) with 7-speed DSG (DQ381 and DQ500)

CTS Turbo is proud to release our B-Cool DSG filter housing for the VW Golf R and 8V.2 S3/RS3/8S TTRS 7-speed DSG (DQ381 and DQ500).  The OE plastic filter housing is quite fragile and is know to become brittle and crack over time going through many heating and cooling cycles.  Each CTS Turbo B-Cool DSG filter housing is constructed in house from T6061 Aluminum.  Not only does the B-Cool filter look good, but it works great.  We have engineered cooling fins into our design to act as a heatsink, which dissipates heat in the oil. This helps maintain the viscosity in the oil to keep optimal performance. Replaces part number 0BH325159. This is another original CTS Turbo part with heat-dissipating fins, which has been replicated by other manufacturers without success as they do not have the capability to produce the specific thread required for proper installation. Product Details:

• Made in Canada from billet T6061 Aluminum
• Provides additional cooling by dissipating heat
• Hard anodized black for stealth and longevity, will not discolour or fade
• Re-uses OEM O-ring
• OE-style threads are precision made to fit just like a factory part
• Direct replacement for OE housing 0BH325159
• Uses OE DSG replacement filter 0BH325183B

Fitment (7-speed DSG transmission only):

• 2018+ Audi RS3 2.5T
• 2018+ Audi TT-RS 2.5T
• 2017+ Audi RSQ3 2.5T
• 2018+ Audi S3 (8V.2)
• 2018+ VW Golf R (M7.5)

This part also goes by the following cross reference.

Cross Reference Part Number:

Fits These Vehicles 4 applications

RS3

Make	Model	Engine	Years
AUDI	RS3		2018–2020
AUDI	RS3 (8V)		2018–2020

TTRS

Make	Model	Engine	Years
AUDI	TTRS		2018–2021
AUDI	TTRS (8S)		2018–2021

Fitment data last updated: 2026-06-28