Admins, will you please consider giving this a Sticky? While written from a UK / English viewpoint, there is a lot of excellent information here. I thought that we could all consider using it as a foundation, and then add North American specific information to supplement it.
I have the 'all 138,000 characters long file' but the forum rejected my post as it was over 50,000 characters. Let me know where to send the file if you'd like the article prepared for submission to this forum.
Thanks in advance,
Mark


Pre Purchase Inspection of R50, R52, R53 from Garage Dreams article:

Original / Author credit:

https://garagedreams.net/buyers-guid...3-buyers-guide

Ben, might be also known as ‘frosty109’

MINI (R50/R52/R53) Buyer’s Guide

July 8, 2022 Ben

Despite being seen as a bit of a porker when it first launched, BMW’s first MINI Cooper managed to capture much of the charm of the original British motoring icon. Its styling was on point, had a surprisingly good chassis and its peppy little engine provided enough pull to make things exciting (especially the supercharged version in the Cooper S and Cooper S Works GP).
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All righty then; with the total lack of any replies, I'll just begin to occasionally add a new section occasionally to allow folks to get an idea of what I'm proposing.
Section 2:In this R50, R52 and R53 MINI Cooper buyers guide we will be looking at everything you need to know before purchasing one of these cars. From common problems with the MINI Cooper, to its history and specifications, and much more.

Using this R50 to R53 MINI Cooper Buyer’s Guide

To start with we will cover the history and specifications of BMW’s first generation MINI Cooper to give you a bit more background information about the car. We will then dive into what to look out for when buying one and we will finish off with more general car purchasing advice. The R50-R53 MINI Cooper is also known under the following names:

• MINI Hatch (USA)
  
  
• MINI Hardtop
  
  
• MINI
  
  
• MINI One (base model version of the car)
  
  

This is a long guide, so use the table of contents below to skip to the section you want to read (T.O.C. disabled in this text format, so go to link at beginning for that function, or just read it all) We are not going to be specifically looking at the diesel versions of the Mini (or Mini One), but much of the information in this guide still applies to them.
Table of Contents

• History of the First Gen Mini Cooper (2001 to 2006) and Mini Convertible (2004 to 2008)
  
  
• First Generation MINI Specifications
  
  
• MINI Cooper and Cooper S (R50, R52 and R53) Buyer’s Guide
  
  
• MINI VIN Decoded/Explained
  
  
• Engine
  
  
• Transmission
  
  
• Suspension & Steering
  
  
• Brakes
  
  
• Bodywork & Exterior
  
  
• Interior
  
  
• Electronics, Locks and Other Things
  
  
• General Car Buying Advice for a First Gen MINI
  
  
• First Generation MINI Buyer’s Guide Conclusion
  
  

References