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Hyundai Sonata Hybrid



  • Kirstie_HKirstie_H Posts: 10,813
    If you recently considered a hybrid but decided on a fuel-efficient non-hybrid instead, please email by Friday, February 3, 2011 to share your story.
    Please include your daytime contact information and a few words about the decision you made.

    Need help navigating? - or send a private message by clicking on my name.
    Share your vehicle reviews

  • I doubt they work for Hyundai... I do agree that it's difficult in my opinion for this vehicle to average much better than the advertise MPG. But it's certainly possible to get EPA ratings. To the other poster about 50mpg on highway... I an get 50 consistently on highway if I'm careful also but it's difficult to average 50mpg on a whole tank even if you do a lot of highway driving. My best average tank was about 46 but typically careful driving for a full tank would get around 40 maybe 42 or 43. With my 2010 Prius if I was careful I could get over 60mpg which is 20% over EPA consistently. I think this comes to weight and power availability... keep in mind this car does have over 200hp and is much larger than the Prius. Even when I try to drive really well... I inevitably utilize way more power than I need periodically. This is not possible for the Prius which I used to floor the pedal all the time in only to keep up with traffic or merge into crazy new york/new jersey highways.
  • kyrptokyrpto Posts: 216
    "For whatever reasons, a very small number of Sonata Hybrid drivers appear to be unable to drive the car efficiently. A look at bears this out as most Hyundai owners are getting mpg in the low to mid 30s. Some do even better."

    Drove 175 miles early one morning last week.
    For first two hours temp never got above 26 (F) and the last hour it never got above freezing.
    60 - 65, cruise = slightly over 37mpg.
    No hypermiling just cruising.

    Later that day drove the 175 back home w/ temp at 52 - 53.
    Got almost 40mpg on that leg.
  • Your situation is the EXACT same situation I am getting. (For a minute there I thought maybe it was my posting LOL) I live in Rhode Island. The winter has been extremely mild. I have to add more to my problems. At 2500 miles my transmission died. I was getting excellent mileage up until that point. From the time the new transmission was installed, my mileage dropped to 27/28 mpg - highway. I am not getting any answers and it is getting very frustrating.

    Cindi :(
  • kyrptokyrpto Posts: 216
    who is a member of this forum:

    Join that forum and send him a pm w/ your vin #.
    He has helped others get issues resolved.
    His specialty is the powertrain.
  • vinnygvinnyg Posts: 57
    On Ebay there is a spare tire kit as well:
  • vinnygvinnyg Posts: 57
    Here's what all of us 2011-2012 Sonata Hybrid owner's have been waiting for:

    This bulletin provides information related to a software update of the following controllers: ECM/TCM/HCU/MCU/AHB/OPU by GDS Event#302, and BMS by Event#303.
    This ECU Update will refine vehicle drivability, HEV transaxle shifts, and cruise control.
    Applicable Vehicles: 2011-2012MY SONATA (YF) 2.4L Hybrid Electric Vehicle (HEV)
    In order to get this you need to complaign about hesitation and jerking situations. HSH owners who have had this done report Hyundai has fixed their problems.
    This TSB will make your hybrid's acceleration much smoother, especially during the cold first start up of the day.
    You must complain to your dealer about the jerkiness and hesitation in order for them to install this repair. It personally has helped me and many others with drivability issues.
  • srcoopersrcooper Posts: 3
    Thank you for sharing this information!
  • vinnygvinnyg Posts: 57
    and real world driving experiences after the updates have been installed, you can look here: tml
  • vinnygvinnyg Posts: 57
    Just want to bump this for all 2011-2012 Sonata Hybrid owners who have not had the latest TSB 13-FL-004 performed. It enhances drivability and stops the cold start jerkiness and hesitation.
    You have to actually complain about those symptoms to the dealer to have this installed, as it is not a recall, but a TSB.
  • kyrptokyrpto Posts: 216
    Upgrades for 2013 Sonata Hybrids:

    1. More powerful electric motor with output up from 30 kw on 2011- 2012 to 35 kw on the 2013s.
    More torque.

    2. Smaller yet more powerful lithium-polymer battery pack that ups the battery discharge power significantly from 34 kw to 47 kw on the 2013 model.
    More power.

    3. Updated Hybrid Starter Generator from 8.5 kW to 10.5 kW of capacity to provide more charging capacity and seamless electric starts.

    Hyundai also improved the hybrid system clutch control, vehicle response by throttle tuning, as well as optimizing regenerative braking shift pattern, and decreasing friction in the compact six-speed transmission.
  • srcoopersrcooper Posts: 3
    I got it installed three weeks ago - it makes a difference! Thanks for sharing this info!!!!!
  • vinnygvinnyg Posts: 57
    I'm glad it helped you. Hopefully many more hybrid owners will see this and get the TSB installed on their cars. It makes a world of difference.
  • kyrptokyrpto Posts: 216
    Oh, don’t forget the lifetime warranty on the advanced lithium polymer battery pack and Hyundai’s 100,000 mile/10 year power train warranty.

    Both lead the industry.
  • kyrptokyrpto Posts: 216
    The Sonata hybrid has unique mirror mounted turn signals, chrome side moldings, different front fascia, more aero rear, a different decklid, hybrid specific LED running and brake lights, and unique fog lights.
  • kyrptokyrpto Posts: 216
    The Hyundai hybrid system’s rapid battery charge up and discharge have some similarities with recent Formula 1 Racing technology.

    The introduction of the Kinetic Energy Recovery System that will eventually make every future Formula One race car a hybrid began in ’09.

    F1 teams may use KERS to draw 60 Kw from the rear axle, store that energy and reuse it by pushing a 'boost' button. Basically the system uses regeneration to collect and store energy during braking.

    The system allows the drivers to use 60 Kw (82 hp) for 6.6 seconds per lap. The system is fairly conventional, using a single 60 Kw liquid cooled brushless direct current motor / generator unit. The motor is attached to the front of the 2.4 liter V8 and driven by a reduction gear off the crankshaft.

    Also included in the system is a KERS control unit, separate from the Microsoft supplied FIA engine control unit. The battery pack is mounted at the bottom of the fuel cell and in the case of Ferrari is supplied by French Li-ion battery maker Saft.
  • kyrptokyrpto Posts: 216
    edited August 2013
    Yep, I just figure that with all these F1 race cars in such a high heat environment, sometimes even wrecknïg and never a mention of a Lithium battery pac doing anything abnormal, us civilian hybrid drivers are probably safe.

    I remember early in the Toyotas hybrid rollout, and especially after the Highlander Hybrids were introduced, when rumors of rescue personnel being killed by hybrid components were common.

    A Li-Polymer type battery is used for the Sonata Hybrid.
    The basic function of the battery system is to store, in chemical form, electric energy obtained either from the engine or regeneration and supply the stored energy as needed.
    Additionally, it has to manage input and output power based on the state-of-charge (SOC). The BMS (battery management system) performs accurate estimations of battery status and controls the temperature appropriately.

    Compared to conventional first gen NiMH batteries for hybrids, the Li-Polymer type battery of the Sonata Hybrid has a better performance in the power/energy density by weight and volume, self-discharge rate, life cycle, cold weather characteristics, SOC estimation etc. - -7&issueKey=2&volumeKey=2011&smart42SID=s292et2tk0rsnjgi81nqp0c9r3&smart42SID=s2- - 92et2tk0rsnjgi81nqp0c9r3
  • vinnygvinnyg Posts: 57
    edited August 2013

    Description: This bulletin describes the procedure to replace the rear lower control arms on some Sonata (YF), Sonata Hybrid (YF HEV), and Azera (HG) vehicles.
    Applicable Vehicles: SONATA (YF), SONATA HYBRID (YF HEV) AZERA (HG).
    YF Sonata (MY 2011, 2012, 2013)
    16" wheel vehicles: Job #1 to Jan 7, 2011
    17/18" wheel vehicles: Job #1 to April 5, 2012
    YF HEV Sonata Hybrid (MY 2011 AND 2012)
    Job #1 to April 4, 2012
    HG Azera (MY 2012)
    Job #1 to April 4, 2012
    Area: Salt belt states, fleet, and regional company vehicles.
    USA salt belt areas: Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Hampshire, New Jersey, New York, Ohio, Pennsylvania, Rhode Island, Vermont, West Virginia, Wisconsin, and the District of Columbia.
  • DESCRIPTION: On some 2012~2013 Sonata (YF) and 2012 Sonata Hybrid (YF-HEV) vehicles with panoramic sunroof, a slight creaking or rattle noise in the roof may be heard. If the source of the noise is around the roof area on top of the B-pillar, follow the procedure outlined in this bulletin to eliminate the noise.
    This basically uses "acoustic felt" and Loctite to secure the sunroof cross-members to stop the creaking.
    BODY (Interior & Exterior)
    AUGUST 2013
    2012 ¡V 2013 SONATA
    (YF & YF-HEV)
    Applicable Vehicles:
    MY12~13 SONATA equipped with panoramic sunroof
    „h Produced from June 1, 2011 to August 7, 2013
    „h Produced from June 1, 2011 to May 1, 2012
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