I have a 2011 Prius C. I've gone from an average of about 48 mpg down to a current 36 mpg in a matter of a month. WHAT could be causing this? This car gets the best care, always on schedule, at the

Asked by Aug 22, 2016 at 08:16 PM about the 2011 Toyota Prius

Question type: Maintenance & Repair

Mileage started dropping about 6 weeks ago, from 48 to 44, then to 42, now at 36 mpg.  Dealer doesn't want to hear it.  I think it might be the big battery, and they don't want to replace it.  Not sure, of course.  Cannot find the Trim on any of my paperwork.  Don't know which it is.  It's a 5 door hatchback.  

10 Answers

27,845

Did you recently replace the tires??

No new tires. Tires are in good shape. I guess I should have mentioned that I have about 77,000 miles on it now.

27,845

Of course, how you drive makes a really big difference.... How many miles are on your car? I cannot imagine that your battery is bad considering you have a 2011.. we have a 2009 PRIUS. We just replaced the tires with Continental energy saver tires...it handles better, but lost about 1 or 2 MPG.

I drive the same way I've driven since I was 16. Not any different from the time I purchased this car to now.

27,845

We have 68000 miles on our 2009, but, I've heard people who have 125,000 miles or more and no large battery issues.. By the way, Toyota warranties the hybrid battery for a long time, check the website....In California, our hybrid battery is under warranty for 10 years or 150,000 miles... It does vary in other states... I would think you're covered.... I'm sure that you can get the hybrid battery tested?

27,845

So, you purchased your car brand new?

27,845

Take a look at your owners manual.... If you can't get anywhere with your local dealership, call the corporate office.... The last thing Toyota wants is disgruntled clients, especially with the Prius... One thing we have had trouble with is the struts....had to recently replace them, NOT a very strong part of the car. After we did this, we noticed an increase in MPG.

27,845

Found this for you on the Internet------ "The battery pack in any hybrid Toyota is warranted either for 10 years or 150,000 miles (in states with California emissions laws) or 8 years or 100,000 miles in all other states." And, he adds, "There's no pro-rating at all. The battery will be replaced at no cost if necessary during the warranty period."May 13, 2011

27,845

If an independent mechanic confirms that your hybrid battery is failing, take this report directly to your dealership......if they still won't help you, pitch a bitch to Toyota corporate.....

27,845

If your hybrid battery is truly failing, YES, that would really hurt your mileage.....

Your Answer:

Prius

Looking for a Used Prius in your area?

CarGurus has 17,884 nationwide Prius listings starting at $1,000.

ZIP:

Toyota Prius Experts

  • #1
    TupeloMS
    Reputation
    690
  • #2
    raae
    Reputation
    650
  • #3
    Tom Demyan
    Reputation
    490
View All

Related Models For Sale

Used Toyota Camry
759 Great Deals out of 73,416 listings starting at $1,195
Used Toyota Prius v
30 Great Deals out of 1,492 listings starting at $6,900
Used Toyota Corolla
623 Great Deals out of 66,697 listings starting at $900
Used Honda Civic
376 Great Deals out of 49,269 listings starting at $1,499
Used Toyota Prius c
21 Great Deals out of 3,374 listings starting at $4,995
Used Honda Accord
566 Great Deals out of 103,985 listings starting at $950
Used Toyota RAV4
526 Great Deals out of 79,409 listings starting at $1,995
Used Toyota Prius Plug-In
13 Great Deals out of 372 listings starting at $7,595
Used Honda Fit
83 Great Deals out of 14,533 listings starting at $1,800
Used Toyota Yaris
48 Great Deals out of 2,452 listings starting at $1,800
Used Honda CR-V
624 Great Deals out of 78,110 listings starting at $1,192
Used Chevrolet Volt
21 Great Deals out of 5,210 listings starting at $6,995
Used Ford Fusion
701 Great Deals out of 62,699 listings starting at $800

Used Cars For Sale

2018 Toyota Prius For Sale
9,393 listings starting at $21,408
2017 Toyota Prius For Sale
13 Great Deals out of 828 listings starting at $16,798
2016 Toyota Prius For Sale
18 Great Deals out of 634 listings starting at $14,493
2015 Toyota Prius For Sale
47 Great Deals out of 2,089 listings starting at $8,995
2014 Toyota Prius For Sale
17 Great Deals out of 533 listings starting at $6,300

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.