Dinan Engineering Reviews

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Unsatisfied with defective product

I purchased this DinanTronicElite piggy back for my N26 which in stock form was running excellent. After installation I recieved Drivetrain Malfunction warnings. I replaced OEM Coils, Spark Plugs and a Waste Gate Acuator still maintained issues. After talking with a Service Manager of a promenent BMW dealership that was a Dinan distributor he informed me of constant issues with the unit then the dealership discounted affiliation.

User's recommendation: Avoid at all cost research other company units.

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After Removal of the unit my vehicle ran perfect so I decided to give the unit one more attempt. I installed it Aug 14 and immediately got a Drive Train Malfunction same as before.

This unit is defective and I have not recieved a reply from dinan appon my first communication.

I think a legal attempt is the next step. If you have any advice it would be greatly appreciated.

#2674633 Review #2674633 is a subjective opinion of poster.
Owings Mills, Maryland
Preferred solution
Full refund
New Reviewer


Dinan Engineering - Question
I have a 2014 BMW 328I with the DINAN Turner installed and I was calling to find out if the DINAN Turner could have possibly contributed to the issues I’m having with my vehicle the car is stuck in park and will not go into drive or reverse or neutral I did some research online and it says that I could be a computer issue related to Turner’s
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The DinanTronicElite piggy back is a product you need to stay clear of Im speaking from experence a very expensive $1276.14 experence save yourself the trouble. I have no more use for any Dinan product because lack of trust.

#1361398 Review #1361398 is a subjective opinion of poster.
Beverly Hills, California
New Reviewer

Defective Dinatronics Sport Module

I purchased a Dinatronics Sport module for my F56 Non S Mini in July of 2017. They unit failed in early December of 2017 after 5 months. I contacted DINAN several times by telephone and after waiting for return calls that never occured, I finally got through to the warranty manager Joe who provided an RMA number to return the product and have it bench tested, verifying the failure. I have now been waiting for over 3 weeks after confirmed delivery to DINAN. When I called today, I was told that "they are really backed up with warranty" work right now, and, was routed to the same guy that won't return my calls or e-mails. I will never buy a DINAN product again. Poor quality. Poor customer service by everyone I have contacted.
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I feel your pain I have a defective DianaTronicElite piggy back unit for a N26 spent $1276.14 only wish I would have spent the money on Rims. After installation I recieved a Drive Train Malfunction warning.

I replaced OEM spark plugs, Coils, and a waste gate Actuator still no improvment and after calling Dinan got no satisfactory actions or answer. Ive had the unit for about 2 months but installed 2 weeks and had high hopes now I want a 100% refund.

#1180499 Review #1180499 is a subjective opinion of poster.
Morgan Hill, California
Dinan Engineering Customer Care
  • Price
  • Customer service
  • Quality
Reason of review
Poor customer service
Preferred solution
Full refund
New Reviewer

Dinan N63 E70 product failure

Dinan Engineering, DinanCars, Dinan product review: If the product doesnt work, they switch the product under “warranty” and refuse to adjust cost. When the product attempts to install and completely disables your car they refuse to cover towing, and rental expenses. To this day...one month later I still have not received the working product I paid for. They blamed my computer virus software for the problem with install. I used 3 different computers. All of them had different virus software and browsers. Their product does not work! I asked for them to price match after what Ive been through at the lower cost product they swapped to and their advertised sale price on their website. They refused to acknowledge the product was on sale( I sent screen shots) and refused to reduce the cost. Now the tune...if one is installed its hard to tell. Many other companies offer better performance for less cost. If you go with Dinan because they talk about a warranty then youll be in for a surprise when its time for Dinan to step up. My car was disabled for two days before I had to take matters into my own hands because of thier lack of communication. I didnt get a response until I threatened them with returning the product. Which, I should have done. They took me down an expensive road. I paid more that double the cost because of Dinans product failure. They offer nothing. Not even a friggen sorry. Just bs blame. Do yourself a favor and dont buy Dinan.
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I completely agree DON'T BY DINAN they have a great presentation just like the snake oil salesman save yourself the trouble of holding this company accountable for substandard quailty. Im speaking from experience a very expensive lesson.

#1167175 Review #1167175 is a subjective opinion of poster.
Dinan Engineering Warranty
Reason of review
Warranty issue

Disappointed With Dinan Stage 1 Upgrade on my BMW

I recently purchased a new 2013 BMW 550IX and after researching Dinan's website, DinanCars.Com and speaking to two Authorized Dinan dealers in MA discussing the Stage 1 software upgrade ($2,999) I decided to move forward. Dinan’s website mentions an incredible increase from 400 HP to 495 HP and an increase in torque from 425 to 573 ft lbs. This sound pretty impressive! My complaint or review is that my results were DISMAL to say the least. My Dinan upgrade resulted in ONLY an 11 HP increase and ONLY 17 ft lbs of torque. I was not ripped off for my money as it was refunded. I was however ripped off for all my time and added expense that I will further explain. I decided to have the upgrade performed at Dinan’s authorized dealer, The BMW Gallery in Norwood after speaking three if not four times with Steven Richards who is the designated technician that does the Dinan Stage 1 upgrade. He informed me he had done many of these and reiterated the increase from the mfg specs of 400 HP to 495 HP and the torque from 425 to 573ft lbs MANY, MANY times! When I asked him how I would ever really know what the actual gain was he advised me to go to Kaizen Tuning in Boxborough to have a dyno test to first determine my present HP and torque and then return there for a follow up test AFTER the Dinan upgrade to confirm the incredible increase. I did exactly as he advised. On Sept. 19th, 2013 I drove one hour to Kaizen and paid $175.00 for a dyno test. The technicians at Kaizen Tuning explained to me as well as Steven Richards had that the true numbers of HP and TQ would be less than what the manufacturer claims in the specs. The manufacturer uses data of HP and TQ derived with the engine sitting on a “dyno frame” whereas the actual true HP and TQ is at the wheels. The dyno testing resulted in 336 HP and 350 TQ. The following day on Friday Sept. 20th I had the Dinan Stage 1 upgrade performed at BMW Gallery in Norwood, Ma. The upgrade or download as they call it took a couple of hours. I might ad Steven Richards again reiterated the claim of an increase of 400 HP to 495 HP and the torque from 425 to 573ft lbs. The following Tuesday Sept. 24th I now returned to Kaizen Tuning and had the Dyno test again performed to confirm the increases The results were: 347 HP and 367 TQ. This translates to an increase in power AFTER the DINAN stage 1 of ONLY 11 HP and 17 TQ. Certainly an incredibly dismal increase after all the bro-ha-ha regarding their claims When I called Steven Richards at Norwood his first reply was Kaizen's graphs were flawed. I also spoke to Scott Leandres, Regional sales manager for Kaizen. He also reiterated very strongly the absolute increase In HP and TQ Dinan claims. Scott McIver of Kaizen Tuning informs me he personally spoke to Steven Richards and stated his dyno results are not flawed. He categorically and unequivocally stands by his results and stated just this on his letter head that I have. What took place these last 9 days is Steven Richards promising me he'd get back to me and each time not hearing from him I would initiate the call. He finally informed me that either they would refund my purchase 100% or I could bring the car in for TWO days of testing. This "testing" was described as a boost test. Steven Richards told me the boost was originally at "9" and after the upgrade it should have been 14 or 15. (This data has since been contradicted from a representative of Kaizen in a follow up e-mail) I again called Scott McIver at Kaizen and he informed me that although not a perfect science each incremental increase in boost should produce 10 more HP. He adamantly stated that if I had gotten that claimed increase in boost it would have reflected on the graphs. Scott McIver of Kaizen Tuning will not budge nor negotiate his stance that my total power increase was ONLY 11HP and 16 TQ AFTER the Dinan upgrade. Today I left a message with Steven Richards stating I would be amenable to a boost test or whatever else he needed to do to give me what I had paid for. I expect to get what Dinan's website, Their regional rep, Scott Leandres states as well as Steven Richards of Norwood BMW claims the upgrade will produce. I did however make it clear he could not have my car for TWO days testing. I was originally told the actual upgrade takes less than 1 hour. I got a call back from Steven Richards explaining they were refunding my payment 100%. Thus my complaint is not that I have been swindled or ripped off, but that I spent a monumental amount of time and energy on this Dinan upgrade. Although I have now gotten a complete refund I cannot recoup the 3 hours I originally spent at the dealership, the 8 hours + in traveling and waiting at Kaizen Tuning and the expense of the two dyno tests that unequivocally prove nothing but the incredibly dismal results of the Dinan Upgrade performed at the BMW Gallery In Norwood, Ma. It was a very far stretch from the claims made on Dinan's website and reiterated by all the representatives associated with this. My complaint is this entire project was a waste of my time and energy and seriously makes me question the claims Dinan makes regarding increases in HP & Torque. The Dinan website is VERY careful not to make any claims of MINIMUM increases in horsepower or torque. Instead the “language” on their website is: The results of Dinan’s tuning are nothing short of breathtaking, with the added boost and related re-calibration producing a maximum output of 495 horsepower at 5000 rpm and 573 lb-ft torque at 3500 rpm.” Obviously this is to protect them from any false claims or advertising but everybody you’ll speak to will “parrot” the maximum claim. MY INCREASE WAS ONLY 11 HP & 17 TQ. I might add here following this entire episode I e-mailed Dinan using a fake name Rich Herman asking questions about the Stage 1 upgrade as I wanted a documented e-mail regarding their claims. This is what I got back from Jeff Rosen. Richard, First off, my apologies for not getting back to you initially. It wasn’t my intention to drop the ball, so that’s my fault. There’s just two of us here at our factory answering all the sales calls and handling emails from consumers and our dealers, so sometimes things get a little hectic. Again – sorry. So – on to the turbo boost levels for the F10 550i. The stock 550i runs approximately 9.5psi. Our Stage 1 software ups that to around 12psi, whereas Stage 2 turns it up to roughly 14psi. Stage 1 brings you to 495hp at 573lb-ft of torque. Stage 2 brings that to 501/580. Though on the surface it appears to be only a minor peak gain as compared to Stage 1, the overall power curves are much more impressive here. We’ve substantially increased power in 1st and 2nd gears over Stage 1, and the results are immediately apparent. So if you’re considering adding our software, I’d suggest going straight to Stage 2, as that’s the best bang for the buck. Let me know if that suffices! Regards, Jeff Rosen Western Regional Sales, Dinan Engineering This e-mail concurs what everybody associated with Dinan and their authorized dealers claim Although Dinan “covers their butt” with their website statement I believe it is REASONABLE TO EXPECT more than just an 11HP increase and more than just 17 ft lbs increase in TQ. Certainly these numbers are incredibly less than their touted “maximum” increase of 95 HP and 148 ft lbs of torque. I’m left to wonder how many past or present customers will just believe all the hype, pay for this Stage 1 upgrade and just assume they got what they paid for without verifying it the way I did. I would advise ANYONE that is considering dropping 3K for the Dinan upgrade to first have a dyno test done and repeat this process after your upgrade. If you're going to spend 3K you might as well pay for two dyno tests to give you the comfort level that you got what you paid for. Lastly make sure you use your credit card so you can get in touch with your bank for a refund if your results are as dismal as mine. I used my Amex and never doubted I would get my money back. Perhaps BMW Gallery and possibly with a discussion with Dinan decided it would be in their best interest to just make me “go away” and give me a refund. I love my new 550IX and was really looking forward to this Dinan upgrade. I am now, Disappointed in Quincy, Ma Bill Mullen
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Great review. Thank you!


Here's the link to the acceleration video: https://www.youtube.com/watch?v=xnobwdGme-A


Thanks for your review. I was planning on buying this upgrade but your article talked me out of it.

Also I viewed the following 550i with Dinan Stage 2 acceleration video and it doesn't appear to be any better than what I'm experiencing with my stock 550ix.

So I'll use the $3K I saved on a OLED TV instead.




This is a great article. I was seriously thinking about getting this upgrade but you talked me out of it.

Also, here's a link to an acceleration video of a 550i with the Dinan Stage 2 upgrade. https://www.youtube.com/watch?v=xnobwdGme-A

What's shown in the video is about the what I experience with my stock 550ix.

Based on your testing (thanks again) along with the acceleration video I'm staying with my stock 550ix and using part of the $3K savings to buy an LG OLED TV.


Dinan has quite a following. I doubt they would get away with selling a phony or substandard product for long.

I interpret this story as inaccurate test results. I wonder if you gave the software a chance(?)


WOW!! MY stage 1 which was also a computer program, only cost me $199 in 2001.on my custom ordered M5.

That $3000 stage 2 was to replace my BMW stock flywheel for a much lighter Dinan one, and that included installation. The truth of the matter is that all Dinan mechanics have the program right on their laptop and it literally takes 10 minutes to upload it to your car! What they charge is between you and the deealer. It sounds to me like you weren't going to a very reputable dealer.

And I HOPE that you DID NOT PAY THAT MUCH FOR A COMPUTER PROGRAM and took your time to shop around!!BTW,I was told to expect about 11HP upgrade in power, but its like a jigsaw puzzle, the more stages you buy will get you a MUCH FASTER car than one that is off the assembly line. Mine was done at a BMW dealer in Marietta/Atlanta GA. Great guys to deal with at Global Imports. I dont know how far away you are, but it might make it worth your while to call their service dept and ask them some questions about their current prices and tell them you had heard that they were great on pricing AND to work for.

You can also mention that you hears it from an ex M5 driver that they'd done work on My 2001. To help jog their memory, my license plate said MOMS M5.

Yeah I think I was probably the only female M5 owner they had back then.. :zzz

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#452765 Review #452765 is a subjective opinion of poster.
Boston, Massachusetts

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