ZF 6073.015.420 EST 37 A for WG210 | OEM Genuine Part

Overview

The ZF 6073.015.420 EST 37 A for WG210 is an OEM genuine electronic control unit (ECU) specifically engineered for the WG 210 series automatic transmissions. This critical component governs shift timing, pressure modulation, and torque converter lockup, ensuring precise gear engagement under varying load conditions. Positioned within the transmission valve body assembly, the SKU 6073.015.420 interprets input from vehicle sensors to optimize performance in heavy-duty commercial applications. When paired with a robust TRANSMISSION HOUSING, this part forms the electronic backbone of the entire gearbox system.

Symptoms of Failure

• Erratic shifting or delayed engagement: A worn EST 37 A unit often causes harsh or unpredictable gear changes, especially when the transmission is cold. This symptom is frequently searched as “ZF WG210 shift hesitation causes.”
• Intermittent loss of communication: The ECU may fail to transmit data to the vehicle’s CAN bus, triggering warning lights and forcing the transmission into limp mode. This is a common failure mode for “ZF 6073.015.420 no communication.”
• Oil contamination from internal short circuits: Electrical failures within the control unit can degrade internal seals, allowing transmission fluid to mix with electronic components. This leads to “ZF transmission oil in wiring harness” issues.
• Torque converter lockup failure: A malfunctioning EST 37 A prevents proper clutch engagement, resulting in elevated fluid temperatures and reduced fuel economy—a classic sign of “WG210 torque converter not locking.”

Technical Specifications

Compatibility

This EST 37 A control unit is primarily designed for the ZF WG210 series, but it also shares compatibility with the WG180, WG200, and WG211 models due to identical electronic architecture. The part integrates directly with the HOUS.FRONT SECT and the HOUSING REAR PART to form a sealed electronic compartment. For full assembly, the HOUSING REAR SECTION must also be correctly aligned to prevent fluid ingress. Always verify your transmission serial number before ordering.

Related Components

Frequently Asked Questions

Q: Can the ZF 6073.015.420 be repaired, or must it be replaced?
A: This OEM genuine part is a sealed electronic assembly. Internal component failure typically requires full replacement rather than repair, as moisture or debris contamination compromises the circuit board.

Q: Does this part require programming after installation?
A: Yes. The EST 37 A must be coded to the specific WG210 transmission variant using ZF diagnostic software. Installation without proper calibration may cause shift quality issues.

Q: How do I confirm this part fits my WG210 transmission?
A: Verify your transmission’s serial number against ZF documentation. The 6073.015.420 is compatible with WG210 units built after 2015. Always inspect the FIXING PLATE and SCREEN SHEET for wear during replacement.