Prime Big Deal Days: Car Gear FavoritesManufacturerAmazon sales appear to multiply every year, with Prime's Big Deal Days being one of the newest added to the fall schedule, starting today and ending tomorrow, October 6–7. It gives us another chance to track down "Big" savings on some of the best automotive products out there so you don't have to. The event kicks off today, and you're in luck, as we sifted through the depths of Amazon to find deals on our favorite automotive products—some of which we've tested.We should mention that Prime Big Deal Days (PBDD) include sales on just about everything. You'll be able to save on beauty products, toys, seasonal items, and even appliances. That's all well and good, but you're here reading MotorTrend, so here are the best PBDD savings we could find on some of our favorite automotive-themed items.Disclaimer alert: Pricing can shift without warning, because of course it does, and you'll need to be an Amazon Prime member to get in on the deals. If you haven't joined Prime yet, you can join by clicking here.ManufacturerLEGO Technic 1966 Ford GT40 MKII Race CarEveryone loves the GT40 (except Ferrari), so it's probably about time you built a Lego example to put on the mantelpiece. This is the MKII variant of the GT40, which did indeed defeat Ferrari at the 1966 24 Hours of Le Mans—with Bruce McLaren and Chris Amon at the helm. Being a Lego Technic set, the assembled car includes a knob on top to control the steering, doors that open/close, and an engine cover that reveals the race-winning V-8 underneath. It's currently selling for 20 percent below MSRP at $59.99.Amir Saidi - MotorTrendLasfit FloormatsAll-weather floormats are one of the best bang-for-your-buck upgrades you can make. Not only do they look premium, but they also make it infinitely easier to keep your interior clean and pristine. In fact, we were so impressed with Lasfit's mats during our floormat testing that we gave them our "Best Budget" accolade. These mats in particular are designed and measured to fit the Toyota Tundra, but the brand also sells mats for most modern vehicles on the market today. The Tundra-specific mats are currently selling for 20 percent below MSRP at $119.98.Amir Saidi - MotorTrendLamtto 11-inch Wireless CarPlay ScreenCarPlay screens are a great way to modernize your existing vehicle without breaking the bank. Several examples fit where your existing radio resides, which is great, but these can sometimes be a pain in the neck to install. That's where this screen from Lamtto comes in as more of a plug-and-play solution. It's essentially just a big touchscreen that mounts to the top of your dashboard, providing the same phone-mirroring capabilities as modern Apple CarPlay, and it's easy to set up. This unit is currently selling for 16 percent below MSRP at $125.99.ManufacturerJetboil Zip 0.8L Portable Fast-Boil StoveThere are those who have heard the name Jetboil and those who will. As a brand synonymous with camping, its fast-boil stove is a great addition to a beginner overlander's cooking kit. This variant measures up at just 0.8 liter, burns propane or isobutane, and comes with an easy-turn knob igniter that will continue to function for at least the first six months of ownership—that's not a knock on Jetboil; that's just a rite of passage. The fast-boil stove is currently on sale for 25 percent below MSRP at $82.49. An important note: The price does not include a gas bottle.Amir Saidi - MotorTrendDyson Car+Boat Handheld VacuumPerhaps it's an industry secret, but we've rarely ever seen Dyson's Car+Boat vacuum not on sale. It proved to be the best of the bunch in our recent car vacuum test, and there's a very good reason for that: Dyson won't explicitly tell you, but the Car+Boat vacuum is effectively just its V8 cordless vacuum sold without the home-specific attachments. We loved the auto-specific vac not only for its performance but also the advancement in design and ergonomics that we come to expect from any Dyson product. The vacuum is currently on sale for 23 percent below list price at $229.99.ManufacturerAncel BD310 Bluetooth OBD2 ScannerOBD2 scanners have been around since well… 1996, when the standard was implemented. Over the decades that followed, these scanners have evolved from chunky electronic bricks into this nifty scan tool that lets you view fault codes through a smartphone app. If you're unfortunate enough to have your vehicle throw fault codes, the ANCEL app will explain what the code(s) mean in plain English. No second-guessing what P0420 code means and how to fix it—that signifies catalyst system efficiency below threshold in bank 1. We digress, because Ancel's smart scanner is currently on sale for just less than 30 percent below its list price at $56.98.ManufacturerWolfbox MV24A 4000A Jump Starter W 160PSI Air CompressorMost everyone will agree that portable jump starters are a great addition to any car emergency kit. That's great, but you know what's even better? A portable jump starter that doubles as an air compressor. This MV24A from Wolfbox kills two birds with one stone, packing a 4,000-amp jump starter and 160-PSI air compressor into one sleek package. It carries an 88.8-watt-hour battery on board and apparently has the juice to jump-start 10.0-liter gas or diesel vehicles back to life—and no, we don't understand the engine-size metric either. Regardless, the MV24A is currently on sale for 33.6 percent below list price at $123.49.ManufacturerTevlaphee Universal Steering Wheel Brake LockOne of our MotorTrend staffers is the proud owner of a 1990s Honda Civic. It's a great little car, but it's old enough that he's started to climb the walls about his pride and joy being stolen. That's exactly where this universal steering wheel/brake lock would come in handy. This particular variant extends up to 33.5 inches and will likely fit his Civic perfectly. It's not rocket science, but a steering wheel lock isn't meant to stop thieves from getting into your car; it's meant to stop them from being able to drive it away. Prime Big Deal Day is a great opportunity to pick this one up, as it's currently 26 percent below list price at $39.95.