MAHLE Transmission Oil Cooler Thermostat – TO693

Description

MAHLE TO693 is an OE-quality automatic transmission oil cooler thermostat for BMW automatic transmission cooling systems.

This thermostat regulates ATF flow through the transmission oil cooler, helping maintain optimal gearbox operating temperature for smooth shifting and improved transmission longevity.

Helps prevent:
✔️ Overheating
✔️ Harsh shifting
✔️ Delayed gear engagement
✔️ Excessive transmission wear

Recommended during:
✔️ Cooling system repairs
✔️ Transmission oil cooler service
✔️ Oil leak repairs
✔️ Preventive maintenance

MAHLE / BEHR is an OEM supplier to BMW, known for factory-quality cooling components.

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Fits BMW Models

• E70 X5
• E71 X6

Common variants:

• X5 3.0d / 35d
• X5 3.0si / 35i / 48i / 50i
• X6 30d / 35d / 35i / 50i

⚠️ Fitment depends on transmission cooler setup.

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Part Numbers

• MAHLE: TO693

BMW OE:

• 17107558267

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What's Included

✔️ 1x Transmission oil cooler thermostat
✔️ Seal / gasket included

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Important

❗ Transmission oil cooler thermostat
❗ Not engine coolant thermostat
❗ Not gearbox service kit
❗ Check cooler housing before ordering

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Common Symptoms

• Transmission overheating
• Harsh shifting
• Delayed gear changes
• Cooling system faults
• ATF temperature issues

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Fitment Summary

✔️ BMW E70 / E71 applications
✔️ Automatic transmission oil cooler system
✔️ OE BMW 17107558267
✔️ MAHLE / BEHR OEM quality
❌ Not engine thermostat