The RX300 is already a fantastic SUV, but the right accessories can really elevate your ownership experience.

First off, I'd highly recommend investing in quality all-weather floor mats. WeatherTech and Husky Liners both make custom-fit options for the RX300 that are absolute game-changers. They'll protect your carpets from mud, snow, spilled drinks, and whatever else life throws at you. I went with WeatherTech for mine about three years ago, and they still look brand new despite harsh winters and sandy beach trips.

For cargo management, a good cargo liner or tray is essential. The RX300 has decent cargo space, but without protection, you're risking stains and damage. I also picked up a collapsible cargo organizer—sounds simple, but it keeps groceries from rolling around and makes everything so much more organized. Look for one with multiple compartments and a non-slip bottom.

Tech upgrades are where you can really modernize an older RX300. If yours doesn't have a backup camera (common on earlier models), aftermarket options are surprisingly affordable and easy to install. A dash cam is another must-have in my book—both for security and insurance purposes. I run a front-and-rear setup, and it's given me peace of mind during my daily commute.

Window visors/rain guards might seem minor, but they're incredibly practical. They let you crack your windows during rain without getting soaked, and they add a subtle sporty look. AVS and WeatherTech both make solid options that are easy to install with adhesive strips.

For interior comfort, consider seat covers if your upholstery is showing wear, or even just to preserve what you have. Neoprene covers are great if you're active or have kids and pets. Also, a sunshade for the windshield will protect your dashboard from UV damage and keep the cabin cooler in summer—your air conditioning will thank you.

Don't overlook roof racks or crossbars if you're into outdoor activities. Yakima and Thule both make excellent systems compatible with the RX300. Whether you're hauling bikes, kayaks, or a cargo box for road trips, they dramatically increase your vehicle's versatility.

Running boards or side steps are another popular addition, especially if you have older passengers or kids who struggle with the step-in height. OEM Lexus running boards integrate beautifully, but quality aftermarket options can save you hundreds of dollars.

For lighting upgrades, consider LED bulbs for interior and exterior lights. They're brighter, last longer, and give the vehicle a more modern appearance. Just make sure you get quality bulbs to avoid flickering or error messages.

Finally, if you want to protect your paint, splash guards/mud flaps are worthwhile, especially for the rear wheels. They prevent road debris from chipping your paint and keep the lower body cleaner.

Bottom line: Start with the practical stuff—floor mats, cargo protection, and safety tech. Then move into comfort and aesthetic upgrades based on your lifestyle. The RX300 is built to last, so these accessories are investments that'll serve you well for years to come. What's your budget and primary use case? That'll help narrow down what makes the most sense for your specific situation!

Jumping in here with some budget picks because you dont always need to drop big bucks to make these old RXs feel fresh. Ive tried many setups over the years and found some solid alternatives to the pricey brands.

• Take a look at Maxliner Custom Fit Floor Mats for 1999-2003 Lexus RX300. In my experience, they fit just as snug as the big names but usually run about 30 percent cheaper. Use that extra cash for gas.
• For the audio, before you touch the speakers, try a Arisign Bluetooth 5.0 Cassette Adapter. It sounds way better than those old FM transmitters and saves you from tearing the dash apart.
• If you hate vent mounts, the iOttie Easy One Touch 5 Dash and Windshield Mount is basically the gold standard for staying put on that curved Lexus dash. I actually remember taking my 01 on a massive road trip through the Smokies a few years back. The car handled those mountain passes like a champ, but I spent half the time obsessing over a tiny rattle in the glovebox that turned out to be a stray nickel. Spent three hours at a rest stop taking the hinges apart just to find five cents... my wife thought I was losing my mind. Anyway, those budget mats will serve you well. But yeah.

Hey! Congrats on the RX300! I remember getting mine... felt like I was driving a cloud, haha. Okay, so for floor mats, I actually went with some heavy-duty rubber ones from WeatherTech. Yeah, they're a bit pricier than the generic ones, but honestly, they've saved my carpets from so much mud and spills. Totally worth it, IMO. For a phone mount, I tried a vent mount once, and it was a disaster – kept falling off. What *really* worked for me was a CD player mount (if you still have a CD player!). It's super stable and doesn't block any vents. As for the sound system, I didn't replace the head unit either. I just upgraded the door speakers and added a small subwoofer under the passenger seat. Made a HUGE difference. You could check Crutchfield for compatible speakers. Hope this helps!

Hey! Congrats on the RX300! It's a solid ride. Regarding the sound system, before you ditch the whole head unit, have you considered just upgrading the speakers? Seriously, sometimes that's all you need for a noticeable improvement, and it's WAY cheaper. I've been there, thinking I needed a whole new system, but new speakers made a world of difference.

Specifically, look for component speakers for the front – a separate tweeter and woofer. They give you better sound separation. Brands like Infinity or JBL are usually a safe bet, but be careful when choosing the speaker size; make sure it fits your RX300's speaker openings! Crutchfield's website is awesome for checking compatibility. Also, I would suggest looking at the speaker impedance, to ensure it matches with the head unit's output. Adding a small amp for the speakers would also improve the sound quality. Hope this helps!

Hey! Congrats on the RX300! It's awesome you're looking to upgrade without breaking the bank. I totally get that. Instead of focusing on the absolute BEST accessories, let's think about the best *value* accessories, okay? 'Cause sometimes spending a ton isn't worth it, IMO.

Okay, so, for the floor mats, yeah, the rubber ones are a good call like the other person said. BUT! Have you considered just getting some decent universal ones from like, Walmart or even Costco? Honestly, they're way cheaper than the fancy molded ones. Option A: Super expensive custom fit ones ($100+). Option B: Decent brand-name universal ones ($40-60). Option C: Basic universal ones ($20-30). Pros of A: Perfect fit. Cons: Expensive! Pros of B: Good fit, decent quality. Cons: Still kinda pricey. Pros of C: CHEAP! Cons: Might slide around a bit. Honestly? I'd start with Option C and see if it works for you! You can always upgrade later, right?

Phone mount... This is tricky. Those vent mounts can break the vent fins eventually, FYI. Have you looked at those cupholder mounts? They're not super elegant, I admit, but they're usually pretty sturdy and cheap. Or even those beanbag dashboard mounts! Those are actually kinda cool and don't require any drilling. It depends on your needs, are you looking for something that will let you view your GPS, or do you just need a place to keep your phone in case you get a call. If you need GPS and you are doing long road trips, I would look for a dash mount.

As for the sound system... Before you go spending a ton of cash, seriously consider just replacing the front speakers. Like, REALLY consider it. A decent set of aftermarket speakers can make a HUGE difference, and you can install them yourself with some basic tools. Check Crutchfield's website; they usually have good deals and even installation guides. Make sure the speakers are compatible with your RX300, and check the wattage of the head unit to make sure you're not overpowering it!

So yeah, my advice? Start small, see what makes the biggest difference for the least amount of money. You might be surprised!

Hope this helps! Good luck with your RX300! Feel free to ask questions.