BMW M57 / N57 Glow Plug Control Unit (Relay) – MAHLE MHG67 / OE - 12217788327/ 12217801201

MAHLE Glow Plug Control Unit / Relay – MHG67 (BMW Diesel)

Quick Info

OEM-quality glow plug control unit (relay module) for BMW diesel engines.
Controls glow plug pre-heating and after-glow operation for reliable cold starts and smooth combustion.

Description

MAHLE MHG67 is a glow plug control module designed for BMW 6-cylinder diesel engines.

The module controls:

• Glow plug timing
• Glow plug current supply
• After-glow operation after startup

This helps improve:

• Cold starting
• Smooth idle
• Emissions control
• Engine efficiency 

Manufactured by MAHLE / Nagares as an OEM-quality replacement module.

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Deep Engine Compatibility

BMW Diesel Engines

✔️ M57N
✔️ M57N2
✔️ N57

⚠️ Early M57 applications may use different control modules depending on production date.

❌ Not for:

• N47
• B47
• B57
• 4-cylinder diesel engines

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Common Models

• E90 / E91 / E92 330d / 335d
• E60 / E61 525d / 530d / 535d
• E63 / E64 635d
• E65 / E66 730d
• E70 X5 3.0d / 35d
• E71 X6 30d / 35d
• F10 / F11 530d / 535d

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Part Numbers

• MAHLE: MHG67
• BMW OE:
  • 12217788327
  • 12217801201
  • 12218591724 

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Technical Details

• Type: Glow plug control unit / relay
• Voltage: 12V
• Connector: 13-pin
• Control system: Pre-glow & after-glow capable (turn0search2)

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Notes

• Direct OE-style replacement
• Plug-and-play installation
• Common failure item on higher kilometre BMW diesels

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Important

❗ Not a glow plug itself
❗ Glow plugs should be tested if faults remain
❗ Faulty modules can damage glow plugs over time

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Common issues when faulty

• Hard cold starting
• Glow plug warning light
• Rough idle on cold start
• Multiple glow plug fault codes
• Failed regeneration support on diesel models

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Fitment Summary

✔️ M57N / M57N2
✔️ N57
✔️ BMW 6-cylinder diesel applications
❌ Not N47
❌ Not B47/B57