TSRM/MK3 Supra/Community Fixes
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Power Steering Fitting Thread Sizes - M17x1.5 for Cooler and Rack

SuspensionintermediateCommunity Verified
Problem

When rerouting or replacing power steering hoses with braided lines or hard pipes, the correct fitting thread sizes for the PS cooler and steering rack ports are not well documented and are difficult to identify.

Unable to determine correct fitting size for power steering cooler connectionsUnable to determine correct fitting size for steering rack pressure portDifficulty sourcing correct replacement fittings or adapters for PS line upgrades
Root Cause

The power steering fittings on the MK3 Supra use an uncommon M17 x 1.5 metric thread size, which is not a standard size in most fitting catalogs, making identification difficult without measurement.

Confidence

Moderate confidence — Multiple community members agreed on this solution

View Original ThreadPosted March 2025 on SupraForums.com