Serpentine Belt Replacement Hyundai Kia Theta II Engine

how to change replace serpentine ac alternator water pump belt hyundai sonata kia optima

Learn how to remove and replace serpentine belt (V-ribbed belt) on Hyundai Sonata and Kia Optima equipped with 2.0T and 2.4L, 4-cylinder engine. The serpentine belt drives your alternator, air conditioner compressor, and water pump. It needs to be replaced if it has cracks or makes squeaking noise at start up.  These instructions apply to Hyundai/Kia with Theta II engine found on models years 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017.

Always pay close attention to the routing of the old serpentine belt before you remove it. It is a good idea to draw a quick sketch or take a picture of the old belt before removal. 

Instructions How to change serpentine belt Hyundai Sonata / Kia Optima

Open Hood

Start by opening the hood on your vehicle. Make sure the engine has cooled down or you risk getting burned. 

Belt Routing

Look carefully at your old serpentine belt and note how it is routed. Note how it goes around each pulley. Draw a quick sketch if necessary.


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Hyundai / Kia 2.4L engine serpentine belt routing.
A-Serpentine Belt, B-Tensioner

Release tensioner

Place the 17 mm wrench on the tensioner bolt and turn up the tensioner to release pressure on the belt. Getting to the tensioner bolt is tricky as there isn't too much room. Be careful with the wrench making sure it doesn't slide off the tensioner. Slide the old belt away from the tensioner and remove it as shown in the following video clip. At this point, you can slowly let the tensioner return so you don't have to keep holding it. Carefully remove the belt from all the pulleys.

Install new belt

Install the new belt can be tricky. There is very limited space for you to get your new belt around the pulleys. Route the new belt in the same exact way the old serpentine belt was routed. Make sure to insert the V-belt ribs into the pulley grooves. Ensure the belt is not twisted. Pull on the tensioner and carefully slide the new serpentine belt in as the last step. If you fully open the tensioner but still can not install the new belt because it is too short, it is very likely the belt is not fitted properly on the pulleys. Inspect and make sure the belt is sitting properly on all pulleys. Ensure the belt is routed properly before you start the car.  Allow the tensioner to rest on the new belt. 

how to replace serpentine belt kia optima 2011 20111 2012 2013 2014 2015 2016


Before you start the car double check the serpentine belt is installed properly. The belt should be sitting correctly in all the pulleys. Since this is a spring loaded tensioner you don't need to do any manual adjustment.


  • Be cautious as you remove the belt from the tensioner. The belt or tensioner can snap and cause damage to you or your vehicle.¬†
  • Before you install the new belt, spin the tensioner pulley to check it is spinning freely.¬†
  • Use a quality serpentine belt to avoid serpentine belt squeaks and noises.¬†


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Scott made a comment.
2 years 4 months ago

The serpentine belt on my Hyundai Sonata keeps coming off. At first I thought I installed it the worng way. But the second time I followed this guide and made sure it was installed properly. It still jumped. Did further investigation and noticed that one of the pulleys does not align properly. It seems that is stick out and the edge of the pulley is damaged. Upon further inspection I could see the side of the belt damaged as well.

Turned out that the alternor wasn't installed aligned properly and need to be fixed.

Just wanted to share this in case any Hyundai Kia owners have problems with their belt that wears out prematurely or comes off.

Thanks for this guide btw.



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