Genuine BMW 11-61-2-458-830 Crankcase Blow-By Heater OEM

The Genuine BMW 11-61-2-458-830 is an OEM crankcase blow-by heater designed to keep the engine's crankcase ventilation (PCV) system operating reliably in cold weather conditions. Blow-by gases — unburned fuel and combustion vapors that escape past the piston rings — are routed back through the intake system as part of BMW's closed crankcase ventilation design. In low temperatures, the moisture within these gases can freeze, blocking the ventilation path and causing pressure buildup that can damage engine seals and gaskets.

This heater element warms the blow-by gas separator or ventilation hose junction, preventing ice formation and ensuring consistent crankcase pressure regulation year-round. As a Genuine BMW part, it is manufactured to exact OEM specifications for a precise, factory-correct fit and long-term reliability.

Key Features:

• Genuine OEM BMW component — exact factory replacement
• Prevents freezing of crankcase ventilation (blow-by) passages in cold climates
• Maintains proper crankcase pressure and protects engine seals
• Designed for precise fitment with no modification required
• Sold as 1 individual heater unit
• OEM Cross-Reference: 11612458830 / 11-61-2-458-830

Replacing a failed or degraded blow-by heater restores proper crankcase ventilation function and helps prevent oil leaks, rough idle, and increased oil consumption commonly caused by blocked PCV pathways. This is a direct OEM replacement sourced from BMW's original equipment supply chain.