BMWDAVE's Standard E60 M5 Buying Advice:
- Don't get Pre-LCI (2005-2007) - Retrofit is expensive and a pain. Plus LCI cars come with Heated Steering Wheel, Soft Close Doors, and DIRAC sound systems as options that the Pre-LCI cars don't get.
- If you bank or have car insurance through USAA, choose to finance your car through them and they will include an aftermarket warranty (Assurant Solutions is the name of the company) in your loan, which is one of the best warranties out there hands down. They haven't dealt with that many E60 M5's and are still unaware as to the kinds of problems they have, therefore they are still cheap compared to the others.
- If you don't have USAA. Then you might have to pay more for an aftermarket warranty. Call NAC, Fidelty, and, Zurich to name a few.
- If you get a 2005-2007 M5, your chances are high of having major problems. If you get a 2008 M5 your chances are 50/50 of having problems. If you get a 2009-2010, your chances of having major (Vanos, SMG, Clutch) problems are way less.
- Be prepared to spend 1 million dollars on gas alone.
- Be prepared to buy a lot of 10W-60 oil from the dealership.
- Put ATE Super Blue Brake fluid in your brake lines right away, standard BMW Brake Fluid for ///M cars is crap.
- Put money aside for repairs not covered by a warranty. When I had an E60 M5 I used to call it my $1,000 dollar car, cause anything that broke on it costs $1,000 dollars minimum.
- Only use Michelin PS2's if you want the best handling performance of the car (The E60 M5 was designed around the Michelin PS2), you will be able to easily take the M5 past 200mph with the Michelins. If you want cheap long lasting tires with loads of grip, then get the Hankook V12's or Hankook RS3's.
- Remove those Charcoal Filters for that extra 1.5 horsepower, every little bit counts.
If you want Mods, that's another thread.
Good luck!