6 Yamaha Wolverine X4 Problems (And Easy Fixes!)

Among UTVs, the Yamaha Wolverine X4 is well-liked. The UTV may, however, run into problems that compromise its efficiency and security.

The most common Yamaha Wolverine X4 problems are faulty seat belt sensors, rear differential seal blowing, faulty tabs, sputtering, windshield deforming, and hard start.

In this article, some of the common Wolverine X4 complaints will be explored along with the fixes below.

Yamaha Wolverine X4 Problems 

These are the most common problems of Wolverine X4 UTV.

Common Problems of Yamaha Wolverine X4

1. Faulty Seat Belt Sensor

The dashboard warning light going out is among the most typical signs of a bad seat belt sensor. The 2019 and 2021 Yamaha Wolverine X4 show this issue the most. 

The sensor could sustain damage over time. Inaccurate readings or a total inability to identify whether the seat belt is tightened will result from this.

There might be an intermittent problem with the sensor recognising the seat belt if the sensor and wire harness are not correctly linked.

The fix

Examining the seat belt buckle for any evidence of wear or damage is the first step in resolving the seat belt sensor problem.

It could be necessary to replace the seat belt if the buckle is broken or the material is tattered.

Make that the sensor and the UTV’s electrical system are both safely linked to the wire harness. The sensor will also need to be replaced if it is broken.

2. Rear Differential Seal Leaking

This issue is mostly complained about by the 2018 Yamaha Wolverine X4 users. 

Oil spilling from the differential housing is the most evident sign of a ruptured rear differential seal.

A blown seal might occasionally make a whining or grinding sound.

Blown seals will cause oil to flow out. The seals may be blown if the differential housing receives an excessive amount of oil.

The fix

Check the seals for imperfections. Take off the differential housing cover and look for any evidence of wear or damage on the seals.

The seals must be changed if they are worn out or damaged.

The seals may have blown if the oil level had been too high. Add the right amount of oil to the differential.

3. Faulty Tabs

Due to damaged tabs, the hood might not close properly. When driving, it can wobble or move. Also, if the hood is not correctly fastened, pollutants may enter.

The plastic may crack over time as a result of exposure to low temperatures and other environmental variables.

The fix

Take out the hoods and the rubber O-broken ring parts. Use warm water and mild detergent to wash the rubber O-ring that the tabs push into.

Use Vaseline or another lubricant to the pins where the tabs engage the rubber O-ring. By doing this, friction will be decreased and the tabs won’t become caught.

You’ll have to install new tabs if the existing ones are seriously broken or are beyond repair.

4. Sputtering

Users of the model 2001, 2017 and 2021 have complained on forums and YouTube about this issue. 

When climbing a hill, a Yamaha Wolverine X4 may splutter and shut off, which is one of the most typical symptoms. Overfilling the fuel tank is the cause of this.

The engine may choke and stall if the tank is overfilled because the fuel may splash around and enter the air intake.

Driving on flat terrain may cause the engine to hesitate or lose power, and the UTV’s fuel efficiency may suffer.

The fix

Empty the tank of any extra fuel. Carefully drain the fuel from the tank until it is at the proper level using a hand pump or a suction pump.

Cleaning the air intake is crucial after removing the extra fuel to get rid of any fuel that could have made its way into the engine.

It’s also possible that the fuel filter is broken or clogged. If required, inspect the fuel filter and replace it.

5. Windshield Deforming

The 2019 Yamaha Wolverine X4 has a bad issue with the windshield. The front edge of the hard top starts to rise up, which is one of the most frequent issues. 

The Factory poly windscreen rips the seal off the top edge of the windshield and bows in as a result.

The mounting hardware might become loose owing to wear and tear over time. The wrong sealant not being used during installation or incorrect installation might also be the cause.

The fix

Make sure the mounting hardware is tight and stable by inspecting it. For any evidence of wear, examine each bolt and tighten it as necessary.

Make sure the hard top’s edge sealing is intact and in excellent shape by inspecting it. To make a suitable seal, use a high-quality sealer for any damaged or empty spaces.

Replace the windshield if necessary.

6. Hard Start

Users have complained about a hard or rough start when the 2019 and 2020  Wolverine X4 is cold.

The Yamaha Wolverine X4 might potentially start, instantly stall out, or run rough with a slow idle speed.

A weak or dead battery is the primary cause of this problem. It may make the starter spin over slowly or prevent the UTV from starting.

The fix

Examine the battery to identify the cause of a hard start. Make sure the battery is in good shape and completely charged.

Replace the battery with a fresh one if it is weak or dead.

Which Year Yamaha Wolverine X4 Has the Most Problems?

The 2019 and 2021 Yamaha Wolverine X4 are known to have the most problem among the other models. The users of the 2021 Yamaha Wolverine X4 face sputtering and faulty seatbelt sensor issues the most.

The sputtering is caused by overfilling the tank and 2001, 2017, and 2021 models have received the most complaints on these issues.

The 2019 and 2021 Wolverine X4 has the most faulty seatbelt sensor problem.

This problem is caused by the damaged sensor and an unlinked sensor and wire harness. The 2019 Yamaha Wolverine X4 has many commonly known issues such as hard start and windshield deforming.

These 2 issues are caused by the weak or dead battery and low-quality material used to build the windshield.

Frequently Asked Questions (FAQs)

What is the Yamaha Wolverine X4’s maximum weight capacity?

Up to 600 pounds.

What kind of engine does the Yamaha Wolverine X4 have?

A liquid-cooled, DOHC, inline three-cylinder engine with an 847cc displacement.

What is the Yamaha Wolverine X4’s top speed?

Around 55 mph.

What is the Yamaha Wolverine X4’s ground clearance?

10.7 inches.

Yamaha Rhino 700 Problems


Yamaha Wolverine X4 is a great UTV, however, it also has a few problems.

These are the most common problems of the Yamaha Wolverine X4.

  1. Faulty seat belt sensor
  2. The rear differential seal leaking
  3. Faulty tabs
  4. Sputtering
  5. Windshield deforming
  6. Hard to start

Suzuki King Quad 750 vs Yamaha Grizzly 700

Yamaha Grizzly vs Honda Rubicon

Yamaha Kodiak 400 Problems

Yamaha Big Bear 400 Problems

Yamaha Rhino 700 Problems

Yamaha Rhino 450 Problems

Yamaha Moto 4 Problems

Scroll to Top