12V Glow Plug Control Module – Compatible with BMW Diesel E90/E91 – OE# 12217801201, 12217786821 Replacement – OE-Style Timing Relay for Pre-Heating System

Is your BMW diesel vehicle experiencing difficulty starting in colder temperatures? A malfunctioning glow plug module can disrupt the pre-heating process and cause extended cranking. The Boxonly 12V Glow Plug Control Module is engineered as a precise OE-style replacement to restore efficient glow plug operation. ✅ Problem: When glow plugs don’t receive accurate timing signals, the engine may struggle during ignition—especially in cold climates—leading to poor performance and strain on the battery. ✅ Agitation: Prolonged starting can reduce engine lifespan, drain battery charge, and cause unnecessary wear to internal components. Replacing the original module with an unreliable unit could risk further issues if compatibility or timing is off. ✅ Solution: Boxonly offers a high-quality replacement designed specifically for BMW E90/E91 diesel engines. Compatible with OE numbers 12217801201 and 12217786821, this unit matches factory specifications and delivers consistent signal timing to glow plugs. It features heat-resistant materials, precision-molded connectors, and no requirement for ECU reprogramming. Installation is fast and secure with pre-drilled mounting points and factory-style connectors—no splicing, soldering, or extra tuning necessary. Operating at 12V, the module supports the original glow plug timing function only and maintains compatibility with all OEM emissions and safety systems.

• 🔧【Vehicle-Specific Fitment】🔧 – Designed for BMW diesel E90/E91 models using OE# 12217801201 and 12217786821. Perfect fit for the original module location.
• 🛠【Direct OE Replacement】🛠 – Replaces the original glow plug module with no reprogramming or special setup required. No changes to ECU or emission components.
• 💡【Durable & Heat-Resistant Design】💡 – Made from quality electronics and high-temp-resistant housing for consistent, safe operation under hood conditions.
• 📦【Quick Plug-In Installation】📦 – Factory-style connectors and mount points make it easy to install without cutting wires or altering original configurations.
• ⚙️【12V Operation for Pre-Heating Only】⚙️ – Operates on a standard 12V circuit to manage glow plug timing. Not intended for tuning, ECU modification, or emission system bypass.