There’s a special kind of magic to the 2013 Polaris RZR 900 XP 4 seater. It hit the market at a perfect time, offering a thrilling blend of power, long-travel suspension, and room for the whole crew. It’s a machine that defined a generation of side-by-sides and is still a formidable rig on the trails today.
You know that if you own one, or you’re thinking about buying one. But keeping this legendary beast running at its peak, or bringing a used one back to its former glory, takes the right knowledge. You need a no-fluff guide from guys who have been there, turned the wrenches, and gotten the grease under their fingernails.
That’s exactly what we promise to deliver. This is your complete owner’s manual, written for the real world. We’ll cover the common quirks and problems to watch for, a practical maintenance schedule, smart upgrades that actually make a difference, and even how to be a responsible rider. Let’s get your RZR dialed in.
Why the 2013 RZR 900 XP 4-Seater Remains a Trail Legend
Before we dive into the nuts and bolts, let’s appreciate what makes this machine so special. Understanding its strengths helps you know what to preserve and enhance. The benefits of the 2013 Polaris RZR 900 XP 4 seater are clear to anyone who’s driven one.
The ProStar 900 Engine
The heart of this RZR is the 875cc ProStar 900 twin-cylinder engine. Pumping out a claimed 88 horsepower, it was a game-changer in 2013. It’s a peppy, responsive motor that delivers a serious thrill when you mash the pedal.
This engine provides a fantastic power-to-weight ratio, making the four-seater feel surprisingly nimble despite its longer wheelbase.
Game-Changing Suspension Travel
The “XP” in the name stands for Xtreme Performance, and the suspension is where it shines. With 13.5 inches of travel in the front and 14 inches in the rear, paired with Walker Evans shocks on many models, this RZR soaks up bumps, whoops, and ruts with incredible composure.
This long-travel setup is what allows the machine to feel stable and planted at speed over rough terrain, giving the driver confidence to push harder.
Room for the Whole Crew
The biggest draw is, of course, the four seats. It transformed the RZR from a solo or two-person thrill ride into a family adventure machine. The extended wheelbase required for the extra seats also adds a layer of stability on steep climbs and fast, open trails.
Common Problems with the 2013 Polaris RZR 900 XP 4 Seater (And How to Fix Them)
No machine is perfect, and after a decade on the trails, the 2013 RZR 900 has a few well-documented weak spots. Knowing these common issues ahead of time is half the battle. Here’s what to look for.
Engine and Air Intake Dusting
This is arguably the most critical issue to check. The stock air filter box and intake plumbing were not perfectly sealed from the factory. This allows fine dust and silt to bypass the filter and get sucked directly into the engine, causing catastrophic damage to piston rings and cylinder walls.
- How to Spot It: Look for fine dust inside the “clean” side of the airbox (after the filter). A compression test is the ultimate check; low or uneven numbers are a huge red flag.
- The Fix: Immediately upgrade to a quality aftermarket air intake system like one from Donaldson, R2C, or S&B Filters. Many owners also add a particle separator for extra protection in dusty conditions. Sealing the stock airbox lid with a better gasket or silicone can also be a temporary fix.
Clutch and Drive Belt Wear
The stock clutch setup works, but it’s not optimized for heavy loads, big tires, or aggressive driving. Premature drive belt wear or failure is common. You might notice a burning smell, slipping under acceleration, or a loss of top speed.
- The Fix: Install an aftermarket clutch kit from a reputable brand like EPI or Dalton. These kits come with different weights and springs to recalibrate your clutch for your tire size and riding style. It’s one of the best performance mods you can make. Always carry a spare belt and the tools to change it on the trail.
Wheel Bearings and Bushings
The constant abuse of off-roading takes its toll on wear-and-tear items. Wheel bearings and A-arm bushings are at the top of the list. A clunking sound from the suspension or excessive play when you wiggle the tire (at the 12 and 6 o’clock positions) are telltale signs.
- The Fix: This is a straightforward DIY job. Replace worn-out components with heavy-duty aftermarket options from brands like All Balls Racing or SuperATV. Greasable bushings are a fantastic upgrade, allowing you to push out water and contaminants regularly.
Heat in the Cockpit
The engine sits right behind the front seats, and the coolant lines run through the center tunnel. This can create a significant amount of heat in the cab, especially on slow, technical summer rides.
- The Fix: Installing a heat shield kit for the center console and firewall makes a massive difference. These kits use reflective, insulated materials to block radiant heat from entering the cockpit, making your ride much more comfortable.
Your Essential 2013 Polaris RZR 900 XP 4 Seater Care Guide
Consistent maintenance is the key to longevity. Following this 2013 polaris rzr 900 xp 4 seater care guide will save you from costly repairs and unexpected breakdowns on the trail. These are the best practices every owner should follow.
Pre-Ride Checklist (Every Single Time)
Don’t skip this! A 5-minute check can save you a 5-hour walk back to the truck.
- Check Engine Oil: Pull the dipstick, wipe it, re-insert it fully, and check the level.
- Inspect Coolant Level: Look at the overflow bottle. Make sure the level is between the ‘Min’ and ‘Max’ lines.
- Tire Pressure: Check all four tires. Incorrect pressure affects handling and increases the risk of flats.
- Air Filter: Pop the lid and take a look. If it’s dirty, clean or replace it. Never ride with a compromised filter.
- Visual Inspection: Walk around the machine. Look for any loose bolts, leaking fluids, or damaged CV boots.
Post-Ride Maintenance
What you do after the ride is just as important.
- Wash It: Clean off mud, sand, and grime. This prevents corrosion and makes it easier to spot potential issues like leaks or cracks.
- Grease It: Your RZR has several grease fittings (zerks) on the suspension and driveline. Use a quality marine-grade grease and a grease gun to pump fresh grease in until you see the old stuff purge out.
Scheduled Service Intervals
Refer to your owner’s manual for the exact schedule, but here are the general rules of thumb for the average trail rider.
- Engine Oil & Filter: Every 25-50 hours of use, or at least once a year. Use a quality synthetic oil like Polaris PS-4.
- Transmission & Differential Fluids: Change these every 50-100 hours. They don’t break down like engine oil but can get contaminated with water.
- Drive Belt: Inspect for glazing, cracks, or flat spots every 50 hours. Replace it if you see any signs of wear.
Smart Performance Mods: How to Upgrade Your RZR 900 XP
The upgrade rabbit hole is deep, but some mods offer more bang-for-your-buck than others. Here’s how to spend your money wisely to improve performance and reliability.
1. Protection First
Before adding power, protect your investment. A good set of UHMW (Ultra-High Molecular Weight) plastic skid plates will save your frame and drivetrain components from rock damage. A-arm guards and rock sliders are also smart additions.
2. The “Must-Do” Reliability Mods
As mentioned earlier, an aftermarket air intake system and a clutch kit are non-negotiable. They address the machine’s biggest weaknesses and will make it more durable and enjoyable to drive.
3. Wheels and Tires
This is where you can tailor the machine to your terrain. A good 8-ply, puncture-resistant tire is a great investment. Be cautious about going too big—larger, heavier tires put more strain on your axles, bearings, and clutch. A 28″ or 29″ tire is often a sweet spot for the RZR 900.
4. Lighting and Comfort
An LED light bar can turn a night ride from a sketchy crawl into a high-speed blast. For comfort, consider adding harnesses instead of the stock seatbelts for better safety and support. A roof and windshield will also dramatically improve your experience in bad weather.
Sustainable & Eco-Friendly Off-Roading Best Practices
Being a true enthusiast means protecting the trails we love for future generations. Adopting a few sustainable 2013 polaris rzr 900 xp 4 seater habits is easy and makes a huge impact.
An eco-friendly 2013 polaris rzr 900 xp 4 seater approach isn’t about sacrificing fun; it’s about being smart and respectful.
- Tread Lightly: Stay on designated trails. Don’t create new bypasses around obstacles. Avoid sensitive areas like meadows and waterways.
- Proper Fluid Disposal: When changing oil or coolant, use a drain pan to catch every drop. Take used fluids and filters to an auto parts store or local recycling center for proper disposal. Never dump them on the ground.
- Wash Responsibly: Use a biodegradable, phosphate-free soap. If possible, wash your machine on a grassy area away from storm drains to allow the ground to filter the runoff.
- Pack It In, Pack It Out: This one is simple. Whatever you bring with you on the trail, bring it back out. Leave the trail cleaner than you found it.
Frequently Asked Questions About the 2013 Polaris RZR 900 XP 4 Seater
What is a 2013 Polaris RZR 900 XP 4 seater worth?
Value depends heavily on condition, mileage, and aftermarket upgrades. As of the early 2020s, a clean, well-maintained model typically ranges from $8,000 to $12,000. Machines with significant issues or very high mileage can be found for less, while fully built rigs can command more.
How fast does the RZR 900 XP go?
A stock 2013 RZR 900 XP has a top speed of around 70-75 mph in ideal conditions. However, top speed is less important than its incredible acceleration and ability to maintain speed over rough terrain.
Is the 2013 RZR 900 XP reliable?
Yes, with a major caveat. If the air intake issue has been properly addressed with an aftermarket system, the ProStar 900 engine is known to be very durable. The key to reliability is diligent, preventative maintenance, just like with any high-performance machine.
The RZR 900 XP is a fantastic platform, but it demands an owner who is willing to stay on top of its needs.
The 2013 Polaris RZR 900 XP 4 seater is more than just a UTV; it’s a ticket to adventure for you and your family or friends. By understanding its quirks, committing to a solid maintenance routine, and making smart upgrades, you can ensure this trail legend provides years of thrilling and reliable service. Get out there, stay safe, and have a blast!
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