Most BMWs are known for their brittle cooling system components. From plastic water pumps to plastic radiators and hoses, you never know what is going to leave you stranded. Be sure to check this common N54/N55 problem area for leaks on your BMW 335i or 135i. If you have high mileage or can visibly see stress areas, replace it before it's too late! All the parts and tools you'll need are linked below.

Radiator vent hose: https://bit.ly/34YnrRe
Upper radiator hose (if you break the nipple): https://bit.ly/34UNCIG
Pentofrost NF coolant concentrate: https://amzn.to/2zhth4w
T20 torx wrench: https://amzn.to/3eHF4t4
Dremel kit: https://amzn.to/3eBaAZM
Pick set: https://amzn.to/2xTkzcv
Assorted hose clamps: https://amzn.to/2XWg6As
Fluid funnels: https://amzn.to/3aABcqQ

😍 MUST HAVE BMW ACCESSORIES
➡️ My favorites: https://amzn.to/2J6RJY4
Shop BMW parts on ECS Tuning: https://bit.ly/2Whl9el
Shop E90 parts on Kies Motorsports: https://bit.ly/2Ks1Veg
Shop 335i parts on Amazon: https://amzn.to/3axh2OQ
Shop E9X 335i parts on eBay: https://ebay.to/3cFqTmM

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🏁 My BMW merchandise: https://bimmerstreet.com
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🚗 2009 BMW 335i
Complete Build Log: https://bmw335i.com
- DINAN Carbon Fiber Cold Air Intake: https://bit.ly/2Vlycfc
- BMS Charge Pipe w/ BOV: https://bit.ly/3aynKE3
- BMS Oil Catch Can: https://bit.ly/2HTxsaJ
- NGK Spark Plugs @ 0.020": https://bit.ly/2TvoDVQ
- High-Performance Ignition Coils: https://bit.ly/2HNI3kf
- LUX H8 180 LED Angel Eyes: https://amzn.to/34YlXq8
- Wheel Stud Conversion Kit: https://bit.ly/39EvfJS

⛽ BMW OIL CHANGES I SWEAR BY
- Motul X-cess 5W-40 oil (5L): https://amzn.to/2HKTbOv
- Motul X-cess 5W-40 oil (1L) x2: https://amzn.to/2HbGpqZ
- Mann oil filter: https://amzn.to/2HLiPT5
- Magnetic drain plug: https://amzn.to/2EYwYsV

🔧 TOOLS I LOVE
- Dragy GPS track timer: https://amzn.to/2J4DILx
- BMW wheel-saver socket: https://amzn.to/3bqTls0
- BMW jack pad adapter: https://bit.ly/2V7F7mX
- 200-piece tool kit: https://amzn.to/2zZlsRd
- Low-Pro floor jack: https://amzn.to/2vq1g8F
- MaxJax home garage lift: https://bit.ly/2WHGZZm

This description contains affiliate links. If you click any of the links above to purchase a product, I will earn a small commission at no extra cost to you. Win-win!