


Koyo Radiator Drain PlugSKU: PI 1186 UPC: 847839000760 Koyo Radiator Drain Plug for BMW 3 Series E36 1992 1999 and 5 Series E39 1997 2003 PI 1186 The Koyo Radiator Drain Plug PI 1186 replaces fragile OEM plastic plugs in BMW E36 3 Series 1992 1999 and E39 5 Series 1997 2003 models including Z3 variants. Built from billet aluminum this plug endures extreme track pressures and heat while enabling fast mess free coolant drains during maintenance. Its robust construction ensures
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Your Koyo Radiator Drain Plug orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.8 ★★★★★
Based on 1471 reviews
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Product Reviews
★★★★★ 5
Got me home after a sidewall cut!
I am very happy I bought this tire repair kit earlier this year. I was out riding my UTV today and had a flat tire caused by a sidewall cut. I used the tireject kit and was up and running again pretty quickly and it was more than enough to get me back the the truck and trailer. I bought this kit instead of going with a spare tire. I have already bought more of the fluid to replace what I used today.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 7, 2020
★★★★★ 5
Amazing sealant and easy to use even in cold weather.
This product is amazing. It poured right into my tire even though it was -8 celcius. It sealed the crack in my aluminum rim and the the leaky tire bead after I hit a rock. Sealed everything and got me back to trailer and it is still holding air.
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Reviewed in the United States on November 18, 2018
★★★★★ 5
Flat tire… try this.
Size: 1 Gallon + Tool, Set name: Small Tire/Bicycle Formula
For husband, that’s what he puts in our tires great price and works well
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Go Ridding and Go Flatless with QuickStrike tire sealent
Size: 1 Gallon + Tool, Set name: Off-Road Formula
I’ve tried several tire sealants over the years on my ebikes and scooters, but FlatOut QuickStrike is by far the best I’ve used. From the moment I added it to my bike tires, I noticed a difference—it’s incredibly easy to install, and you don’t have to convert to tubeless to benefit from its protection. The formula is thin and spreads quickly, sealing punctures almost instantly so you don’t lose much air.
What I feel that really stands out is how effective it is. I ride my ebikes through rough terrain with lots of thorns and debris, and since using FlatOut QuickStrike, I haven’t had a single flat ( unlike before ). Even when I’ve picked up multiple punctures, the sealant has handled them all without a problem. I feel that the peace of mind it gives me is priceless, especially on long rides or commutes where a flat could ruin your day ( and It has in the past ).
Another big plus is that it’s a one-time application—it won’t dry out or turn into a mess inside your tire ( like that Green Stuff ). It’s also safe for both tubes and tubeless setups, and works well in my 20 inch and 14 inch tires. I’ve used it on my ebikes and scooters and the results have been consistently impressive.
Make me feel confident of the durability of my tires on my ride. I bought the gallon bottle because I have a few ebikes and scooters. this stuff works great!
If you want to spend less time fixing flats and more time enjoying your ride, this is the sealant to get. Highly recommend!
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Reviewed in the United States on June 14, 2025
★★★★★ 5
Fat tire savior
Size: 1 Gallon + Tool, Set name: Off-Road Formula
The best fat tire and dirtbike sealant we have found and love the gallon size. Pump clogs but clears with a strong push and love that it is water cleanup.
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Reviewed in the United States on April 16, 2026
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