Tag: r52

Mini Cooper S R53 JCW – New Downstream O2 Sensor

Replaced the O2 sensor with a fresh new one from Vemo. I totally forgot that the Mini Cooper has 2x O2 sensors 🙂 Don’t forget that O2 sensors have a replacement interval which is usually somewhere between 160.000 – 250.000 km.

Update per 01-01-2021: I replaced the Vemo with a new O2 sensor from Magneti Marelli. The Vemo already started giving issues after a short while. It will be the last time that I will be using Vemo.

Mini Cooper S R53 JCW New Lambda Sensor


Mini Cooper S R53 JCW – Injector Service

Cleaned & replaced the rubbers on the blue 380cc Siemens Deka injectors. The rubbers tend to get hard and brittle due to heat, so very important to replace these in time.

I will probably replace the injectors somewhere in the near future for peace of mind.

Mini Cooper S R53 JCW Injector service


Mini Cooper S R53 JCW – Servicing the Eaton M45 supercharger

When I bought the Mini, it had reached the 160.000km or 100.000 miles mark. This is a milestone in the Mini Cooper S service history, because it means that you need to service the Eaton M45 supercharger (new fresh supercharger oil etc etc).

I saw the episode from Wheeler Dealers and felt confident. It was a lot of work, but fortunately it wasn’t complex. As this isn’t my daily driver, I meant I could take the time.

Mini Cooper S R53 JCW Supercharger Service

Mini Cooper S R53 JCW Supercharger Service

Mini Cooper S R53 JCW Supercharger Service

Mini Cooper S R53 JCW Supercharger Service

Eaton M45 supercharger on the work bench

Mini Cooper S R53 JCW Supercharger Service

Mini Cooper S R53 JCW Supercharger Service

The new Compressor Bypass Valve (CBV) vs the old

Mini Cooper S R53 JCW Supercharger Service

Dirty throttle body!

Mini Cooper S R53 JCW Supercharger Service

Mini Cooper S R53 JCW Supercharger Service

Finally cracked the supercharger open to allow for visual inspection of the gears (they looked good!)

Mini Cooper S R53 JCW Eaton M45 service

Mini Cooper S R53 JCW Eaton M45 service

Mini Cooper S R53 JCW Eaton M45 service

Mini Cooper S R53 JCW Eaton M45 service

I also replaced the supercharger coupler with a new oil filled nylon coupler (in red).

Mini Cooper S R53 JCW Oil Filled Nylon Supercharger Coupler


Mini Cooper S R53 JCW – Sitting in the driveway

Snapped a picture of the Mini sitting in the driveway. I love this car 🙂

Mini Cooper S R53 JCW Sitting in the driveway 10-06-2020


Mini Cooper S R53 JCW – Airbox Intake Modification

I wanted to replace the stock air pipe, as it contains a resonator which keeps it silent. It’s also not optimised, leaving room for improvement.

Used 2 aluminium joiners/couplers and flexible piping. Very happy with this cost effective result! Also, I love the supercharger whine 🙂

I also ordered a K&N RU-3190 filter, I didn’t know the previous owner fitted a Pipercross PX1875. In the end I sold the K&N as the fitment wasn’t good.

Mini Cooper S R53 JCW Airbox Intake Modification

Mini Cooper S R53 JCW Airbox Intake Modification

Mini Cooper S R53 JCW Pipercross PX1875 vs K&N RU-3190

Mini Cooper S R53 JCW Pipercross PX1875 vs K&N RU-3190