BMW i3 Battery Cooling System Hose: Bulk Wholesale – The Overlooked Component That’s Causing Thermal Shutdowns in 1 Out of 4 Rebuilt Packs (Now Available in OEM-Spec, Ready for Global Distribution)
“A battery rebuilder in Sweden spent weeks troubleshooting a ‘mystery overheating’ issue in a newly assembled 62kWh BMW i3 pack.
Cells were new. BMS was verified. Wiring was perfect.
Then he inspected the cooling hoses—and found they were made of standard automotive rubber, not rated for prolonged exposure to EV coolant blends and thermal cycling.
Within 30 days, the hoses had swollen internally, restricting flow by 40%. The pack triggered thermal throttling on every highway drive.
He replaced them with CNS-sourced BMW i3 Battery Cooling System Hoses—OEM-spec, ethylene-propylene-diene monomer (EPDM) construction—and the problem vanished.”
If you install, rebuild, or service BMW i3 battery packs, you know that thermal management is non-negotiable.
Yet most suppliers—and even some workshops—treat cooling hoses as generic parts, leading to:
- Restricted coolant flow from hose collapse or swelling
- Leaks at quick-disconnect fittings due to poor durometer matching
- Premature cracking from ozone exposure or temperature swings
- Contamination from incompatible inner linings degrading in EV-specific coolants
These aren’t just maintenance issues—they’re silent killers of battery longevity and performance.
CNS BATTERY now offers bulk wholesale BMW i3 Battery Cooling System Hoses, engineered to exact OEM specifications and validated through real-world thermal stress testing. Because when your pack runs hot, it’s often not the cells—it’s the plumbing.
Our BMW i3 Battery Cooling System Hose: Bulk Wholesale includes:
- 🧪 OEM-grade EPDM material: Resistant to G48/G12++ EV coolants, ozone, and temperatures from -40°C to +125°C
- 🔧 Precision-molded quick-connect ends: Match BMW’s 7/16″ SAE J2044 fittings—no leaks, no adapters
- 📏 Exact length and bend radius: Pre-formed for left/right inlet/outlet paths in 45/50/62kWh i3 packs
- 🌡️ Reinforced inner liner: Prevents collapse under vacuum during coolant fill or high-flow regen
- 📦 Bulk packaging: Individually labeled, UV-protected, and shipped in climate-controlled containers
Available for all i3 battery generations—with separate SKUs for Giga (22kWh), 45/50kWh, and 62kWh systems.
Why Cooling Hoses Matter More Than You Think
The BMW i3’s liquid-cooled battery relies on consistent, unrestricted flow to maintain cell temperatures within ±2°C across the pack.
Even a 15% flow reduction can cause:
- Localized hot spots → accelerated cell aging
- BMS derating → reduced power and regen
- False fault codes → unnecessary diagnostics
Using non-OEM hoses might save $12 upfront—but it risks thousands in premature pack degradation.
“We used to reuse old hoses to cut costs. After two warranty claims from thermal throttling, we switched to CNS hoses. Zero issues in 14 months.”
— Nordic EV Solutions, Stockholm
Built for High-Volume Workshops & Distributors
- Bulk pricing: Save up to 30% on orders of 50+ sets
- Model-specific kits: Each set includes inlet + outlet hoses + O-rings
- Global compliance: Meets ISO 1307, SAE J2044, and BMW GS 93022 standards
- Shelf-life guaranteed: 3-year storage stability when unopened
Whether you’re rebuilding 5 packs a month or 50, having certified hoses on hand ensures every installation meets thermal integrity standards.
Frequently Asked Questions: BMW i3 Battery Cooling System Hose – Bulk Wholesale
Q: Are these hoses compatible with aftermarket coolant?
A: Yes—with any glycol-based EV coolant, including G48, G12++, and HOAT formulas. Not for use with oil or refrigerant.
Q: Can I reuse OEM quick-connect fittings?
A: We recommend using new fittings (included in our kits) to ensure leak-free seals. Old clips often lose tension.
Q: Do you offer custom lengths?
A: Standard lengths match BMW specs exactly. Custom runs available for orders over 200 sets.
Q: What’s the pressure rating?
A: 1.5 bar continuous, 3.0 bar burst—exceeding i3 system requirements.
Q: How are they packaged for shipping?
A: Vacuum-sealed in anti-UV bags, boxed in moisture-resistant cartons, palletized for sea/air freight.
In EV Battery Systems, Reliability Flows Through Every Component—Even the Hoses
Don’t let a $15 part compromise a $7,000 pack.
Equip Your Team with OEM-Spec BMW i3 Cooling Hoses—Engineered for Thermal Stability, Leak-Free Performance, and Long-Term Coolant Compatibility. Order in Bulk and Ensure Every Rebuild Runs Cool, Clean, and Code-Free.
Because precision isn’t just in the cells—it’s in the details that keep them safe.
Secure Your Bulk Supply Today—Specify i3 Model Year and Quantity, and Receive Pre-Validated Cooling Hose Kits Ready for Immediate Installation:
👉 https://cnsbattery.com/ev-battery-home/ev-battery-contact/