• Dec 7, 2007
Dinan, renowned tuners of all things from the propeller people, have finally decided to offer an ECU upgrade for owners of BMW's delectable 335i. The reflashed upgrade necessitates the installation of either BMW's or Dinan's oil cooler, but once the Bimmer's brain is reprogrammed, throttle response is sharpened, the top-speed governor is removed and power levels jump to 384 hp at 5,700 rpm and a kidney pummeling 421 lb.-ft. of torque at 4,300 rpm.

While other companies have been at it for a while (ahem, Vishnu), the Dinan crew is able to offer something that other tuners haven't: a warranty that coincides with BMW's own. The cost, however, is steep, coming in at $1,999 for the reflash alone. Piece of mind – and tuning products for BMWs overall – doesn't come cheap, but for those who want to extract the twin-turbo'd inline-six's full potential, this may be one of the best mods to date.

[Source: e90post.com]

Thanks for the tip, Dmat!


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    • 1 Second Ago
  • 13 Comments
      • 7 Years Ago
      How bout losing a few hundred pounds?
      • 7 Years Ago
      And now that BMW USA is quite aware of the PROcede and willing to void plenty of warranties, I'm sure a lot of people will be happy to put down the extra 600 bucks to keep their warranty... and maybe for the opportunity to put a DINAN badge on the back of their bimmer.
      Now if only I had 45k for a 335 :
      • 7 Years Ago
      hmm...
      visions of a Dinan 135 dancing in my head

      yes, please
        • 7 Years Ago
        I had the same thought, I may have seized up from the excitement
      • 7 Years Ago
      2k sounds like a bargain WITH warranty!
      • 7 Years Ago
      Does this work for the 535 as well? My buddy just picked up a 535xi and was asking me about this.
      • 7 Years Ago
      Let me get this straight,

      A 335 coupe w/ most options Dinan ECU = $50,935 (CarsDirect.com)
      = 384 hp & 421 lb-ft of torque

      A similarly equipped M3 = $63,670 414 hp & 295 lb-ft of torque



      Based on the torque, this Dinan 335 should be about as fast as M3, if not faster, now who the hack is gonna order the M3 for $12,735 more? Imagine that kind of money to be used to upgrade 335's exhaust, brakes, etc...
      • 7 Years Ago
      The price is kinda steep for a reflash but you can't argue with the results. Almost 80+hp improvement is hard to sneeze at.
      BTW, do we know if that HP rating is with a stand-alone reflash or does it require an exhaust upgrade?
        • 7 Years Ago
        The hp gain listed is not at the wheel though. So it is more like 350 whp.
      • 7 Years Ago
      For reference, a prototype Procede v2 from Vishnu puts down 376whp and 406lbft with an exhaust.
      • 7 Years Ago
      Question: does not the 6MT version of the 335i (coupe) already possess the BMW oil cooler? I remember reading something about the manuals getting it but the automatics not getting the oil cooler (at least in early builds)... and BTW I am wholeheartedly convinced my 335(C)i has more than the reported 300 horses, ... I strongly suspect that number was underrated to salvage the remaining year of the last gen 330 hp M3.... this sucker *moves*
        • 7 Years Ago
        BMW inline sixes have always had cooling problems, even going back to the early 70's. You take the bad with the good.
        • 7 Years Ago
        Manual transmission cars come with the factory oil cooler. However, many MT people are still reporting overheating issues at track days. 335i is probably not a good track day choice, but undoubtedly would make an excellent daily driver GT.
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