5 Common Hisun Sector 550 Problems and Their Fixes

The Hisun Sector 550 is more than just a utility side-by-side vehicle- it’s an off-road companion that embodies the spirit of exploration and adventure. With its rugged design, powerful engine, and versatile capabilities, the Sector 550 is always ready to conquer the most challenging terrains and take on any outdoor endeavor.

Owning a Hisun Sector 550 UTV opens up a world of excitement and adventure, but just like any vehicle, it may encounter its fair share of challenges. Some owners may have had trouble-free experiences, while others might encounter issues. Luckily, most of the common problems that arise with this rugged machine are easily manageable.

In this comprehensive Hisun Sector 550 review, we will highlight some of the common issues faced by Sector 550 owners and provide you with practical and straightforward solutions to get your vehicle back on the trail in no time.

Hisun Sector 550 Specs

EngineThis Hisun UTV is powered by a single-cylinder, 4-stroke, liquid-cooled engine with a displacement of 546cc. The Hisun Sector 550 engine provides a good balance of power and efficiency, making it suitable for recreational and utility purposes.
And with electronic fuel injection (EFI), the engine delivers smooth throttle response and optimized fuel efficiency, ensuring reliable performance in various conditions.
TransmissionThe Sector 550 comes equipped with an automatic CVT (L/H/N/R) transmission. This type of transmission offers seamless acceleration without the need for manual shifting.
Additionally, the UTV features a selectable 2WD/4WD system, allowing the driver to switch between two-wheel drive for normal use and four-wheel drive for enhanced traction on challenging terrains.
SuspensionThe UTV is equipped with independent dual A-arm suspension on both the front and rear, which provides excellent wheel travel while absorbing shocks on rough terrains.
The inclusion of adjustable shocks allow riders to fine-tune the suspension to their preferences and adapt to different load conditions, ensuring a comfortable and controlled ride.
BrakesThe Hisun Sector 550 features 4-wheel hydraulic disc brakes on both the front and rear wheels. These brakes offer excellent stopping power and are less prone to fade under heavy use.
TiresThe Sector 550 UTV is fitted with heavy-duty off-road tires to tackle various terrains effectively. The front tires have dimensions of 27 x 9-14, while the rear tires measure 27 x 11-14. These tires are designed to provide a good balance between traction, durability, and handling.
DimensionThe UTV has an overall length of approximately 118 inches, a width of around 61 inches, and an overall height of about 75.5 inches. On the other hand, the wheelbase measures approximately 76.5 inches.
With a ground clearance of around 12 inches, the Sector 550 is designed to overcome obstacles on the trail easily, thus ensuring a smooth and capable off-road experience.
Fuel CapacityThe UTV’s fuel tank can hold approximately 7.5 gallons of fuel. This generous fuel capacity allows for extended off-road adventures and long work sessions without frequent refueling.
Cargo and Towing CapacityThe Sector 550’s cargo bed can carry approximately 500 lbs. of payload, making it practical for carrying tools, equipment, and supplies during work-related tasks. Additionally, the UTV has a towing capacity of approximately 1,200 lbs. which allows it to haul trailers and other light loads with ease.

The Hisun Sector 550’s specifications are proof that it is a versatile and capable off-road vehicle suitable for a wide range of activities, from recreational trail riding to utility work on farms. Furthermore, its combination of power, suspension, and handling makes it a reliable companion for enthusiasts and workers alike.

Hisun Sector 550 Top Speed

The Hisun Sector 550 strikes a balance between agility and speed, making it a well-rounded machine. Although it boasts solid maneuverability and a decent top speed, it may not be the ultimate racer due to its compact size and average engine power. On average, this UTV can reach speeds of approximately 48 mph, which offers a thrilling off-road experience without aiming to win the speed records.

Hisun Sector 550 Reviews

Most of the customer reviews we came across emphasize the positive aspects of the Hisun Sector 550, such as its value for money, reliability, and performance. While there might be minor issues, users seem satisfied with the overall performance and are impressed with the UTV’s capabilities in various riding conditions, including farm use and trail riding.

One reviewer had this to say;

“The Hisun Sector 550 took me by surprise. While I initially had reservations about its power, those doubts vanished as I clocked a few miles and witnessed its true potential. The UTV seemed to come alive, showcasing impressive acceleration. Every feature works like a charm. Even after three months of hard work on the farm, it’s shown no signs of faltering. For the price, it’s an outstanding investment, and I can confidently say it’s a great addition to our fleet.”

Another one says;

“Four months with my Hisun Sector 550, and I’m thrilled with its performance. After careful consideration and comparing it with other ‘major brands,’ I can confidently say that the value it provides is unbeatable. However, I encountered a minor hiccup with the grommets that secure the seat; they tore when I removed them to check the oil. Thankfully, the dealership replaced them promptly”.

More positive experience;

“My love for the Hisun Sector 550 knows no bounds! I welcomed it into my life last August, and boy, has it been an absolute powerhouse. When I hit the trails with the big boys – you know, the likes of Polaris, Can Am, John Deere, and the rest – my Sector 550 fearlessly keeps up and even outshines some higher-priced machines. I’ve customized it with a sleek light bar and beefy 27” tires, but the real game-changer was the incredible clutch kit. With that upgrade, my UTV transforms into a roaring beast, full of life and vigor!

“I absolutely love my Sector 550! It’s been only 3 weeks, and I mainly use it around the farm for various tasks, and it handles everything I need it to do with ease. The only thing I wish I knew is the meaning of the flashing numbers on the dash. I’ve checked the manual, but I couldn’t find any information about them”

“My 550 is a true beast! The land I purchased is in rugged hill country with lots of rocks, but the Sector 550 handles it like a tank. It’s definitely a rock crawler, and I couldn’t be happier with its performance on challenging terrains.”

Hisun Sector 550 Problems

Hisun Sector 550 Problems

Engine overheating problem

Many Hisun Sector users have expressed concerns about engine and exhaust system overheating problems. Generally, overheating can result from engine overload or low coolant levels. Issues with the motor-driven fan, such as blown-out fuses or electrical problems, can also contribute to overheating.

To address these issues, some users recommend installing dual fans to improve engine cooling and wrapping the exhaust to prevent overheating. Additionally, keeping the radiator and grille screens clean is essential, as dirt and debris can exacerbate overheating problems.

In addition, clearing any trash or debris and modifying the hood compartment, including slightly moving the radiator front cooler, may help alleviate overheating issues.

Difficulty starting

Hard starting, slow, or no start issues are not uncommon with this Hisun UTV model. One of the primary reasons behind engine starting problems is insufficient fuel flow in the system. When fuel flow is inadequate or absent, the engine may fail to start.

To resolve this, a thorough inspection of the entire fuel system is necessary, with particular attention to key components like the fuel tank, filter, electric fuel pump, and injector. Additionally, checking the ECU motor and replacing any damaged or clogged parts that disrupt proper fuel flow is crucial for getting the engine running smoothly again.

Another frequent culprit is a weak, broken, or damaged battery, which can hinder the engine’s quick turnover. In some cases, water in the fuel system can also cause starting troubles, especially during winter when the oil viscosity increases while the engine revolution slows down.

You can resolve this by checking the battery to ensure that it is fully charged and the terminals are clean. You may also want to go for oils with different viscosities based on ambient temperatures to help alleviate the problem and ensure a smoother start even in colder conditions.

Underpowered engine

Frequent complaints about poor engine power or insufficient power have been reported by several Hisun Sector 550 users. The engine’s lack of power can be attributed to various factors, including insufficient fuel in the tank, clogged filters, or a blocked injector. To address these concerns, ensure your fuel tank has an adequate supply of fuel, and if the filters or injectors are clogged, clean or replace them as necessary.

Power issues may also arise from a malfunctioning crankshaft sensor or a clogged air cleaner. In such cases, troubleshooting these components is essential. Additionally, thoroughly inspect the ignition system, including spark plugs and ignition coils, for any signs of deterioration or malfunction. If you detect any consider replacing the faulty parts promptly to restore the vehicle’s power and performance.

Engine stalling

Engine stalling or sudden shutdown without warning is also a common issue that can occur with this UTV. One user had a positive initial experience with the vehicle, but after a winter storage break, they encountered recurring stalling and dying problems. The UTV only started in the prime stage, but then it would stall again after a few seconds.

This issue may arise due to insufficient fuel pressure or a low fuel level. A faulty or bad fuel tank and injector could also contribute to the problem. In rare cases, faulty harnesses can also cause starting troubles. Another possible reason for engine stalling is an electrical component failure or a faulty battery.

If you are experiencing abrupt stops now and then, the best thing to do is to get a motor scan to help diagnose the underlying issue. Error codes generated can provide valuable insights into specific issues, thereby helping you to pinpoint the problem more accurately. In most cases, you may need to replace the ECU to help resolve the issue.

Sticky Transmission

The sticky transmission issue with the Hisun Sector 550 is a common concern reported by some users. This problem refers to difficulty in shifting gears smoothly, leading to a ‘sticky’ feeling when shifting or changing gear.

Several factors can contribute to this problem. Firstly, the quality of the transmission fluid plays a crucial role. Over time, the fluid may degrade, leading to reduced lubrication and increased friction within the transmission components.

Clogged transmission filters can also impede the flow of transmission fluid, thereby affecting gear-shifting performance. Worn or damaged transmission components, such as clutch plates or shift forks, can also cause irregular shifting and exacerbate the issue.

Additionally, incorrect transmission fluid levels, either too much or too little, can negatively impact the transmission’s performance. Mechanical misalignments in the transmission system or linkages can further contribute to difficulties in gear shifting.

To address the sticky transmission issue, regular maintenance is essential. First off, ensure to follow the recommended schedule for replacing transmission fluid and filters to help maintain optimal transmission performance.

You will also need to inspect transmission components periodically for wear or damage to facilitate timely replacements. Furthermore, ensure to maintain the correct fluid level through proper servicing. Additionally, you may want to check and adjust the linkages as necessary to help improve gear-shifting efficiency.


Regardless of the few drawbacks, the Hisun Sector 550 offers excellent value and performance at its price point. While some individuals might be tempted by the allure of a larger machine like the Sector 750 for, the Sector 550 is well-suited for many users. With its utility capabilities, it delivers high quality and reliable performance, making it a practical choice for those seeking a reliable and efficient off-road vehicle without breaking the bank.

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