ECU - M2-B4L (12V)
ECU - M2-B4L (12V) is backordered and will ship as soon as it is back in stock.
Delivery and Shipping
Delivery and Shipping
Products ship in 1-2 business days.
ECU - M2-B4L (12V)
ECU - M2-B4L (12V) is backordered and will ship as soon as it is back in stock.
Control Unit (ECU) – Airtronic M2 B4L, 12V
OEM replacement ECU for the Espar Airtronic M2 B4L diesel parking heater. Controls all core heater functions including ignition sequencing, blower speed regulation, fuel metering, and fault diagnostics. A failed or corrupted ECU is one of the most common causes of heater lockout — restoring this unit returns the heater to full factory operation.
Compatibility
- Espar Airtronic M2 B4L
- Part Numbers: 20.1987.05, 20.2032.05
- Voltage: 12V
Key Specs
- OEM Espar replacement part
- SKU: 20.1987.99.5000
- Direct plug-and-play replacement — no programming required
- Compatible with standard Espar diagnostic tools (EasyScan, Edith)
Installation Note
Recommend clearing fault codes with a diagnostic tool after ECU replacement. Verify wiring harness integrity before installation to avoid repeat ECU failure.
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