Keep pressurized fluid moving from the pump to the steering gear with the Sunsong power steering pressure line hose assembly, part number 3404121. It is a direct-fit replacement for the 2007-2015 Mazda CX-9. Engine-specific details are listed in the "Vehicles it fits" section.
The pressure line is the high-pressure side of the power steering system. It carries fluid from the pump to the steering gear to provide steering assist when you turn the wheel. Sunsong is a vertically integrated manufacturer that researches, develops and builds automotive fluid transfer hoses and lines. The company precision-engineers this assembly for exact form, fit and function.
- Pressure ratings: maximum working pressure of 1,500 psi, burst pressure rating of 8,700 psi and tensile strength of 1,600 lb. Sunsong states these figures exceed original equipment performance standards.
- Pressure-tested: every pressure hose goes through a high-pressure quality assurance test before it leaves the factory.
- Pre-assembled with brackets: designed for easier installation and less labor time than versions sold as individual hoses.
Signs this hose may need replacing include:
- power steering fluid leaking from the line or its fittings
- a fluid level that keeps dropping
- whine from the pump
- steering that feels heavier than normal
If a leaking or damaged pressure line is the cause, this assembly replaces it. Diagnose the system before replacing parts.
Interchange: 40190 · 80753 · 352337 · 13404121 · TD1132420G · 77021 · 5351
This part cross-references / interchanges with the following part numbers:
3404121, 40190, 80753, 352337, 13404121, TD1132420G, 77021, 5351
Frequently Asked Questions
What does a power steering pressure line do?
It carries pressurized power steering fluid from the pump to the steering gear, which provides steering assist when you turn the wheel.
Which vehicles does Sunsong 3404121 fit?
It is listed for the 2007-2015 Mazda CX-9. See the "Vehicles it fits" section for engine-specific details.
What pressure is this hose rated for?
Sunsong rates the pressure hose for a 1,500 psi maximum working pressure, an 8,700 psi burst pressure and a 1,600 lb tensile strength.
Is the hose tested before it ships?
Yes. Every Sunsong pressure hose goes through a high-pressure quality assurance test before it leaves the factory.
What are signs the pressure hose may need replacing?
Signs include fluid leaking from the line or fittings, a dropping fluid level, pump whine or heavier steering. Other parts can cause the same symptoms, so diagnose the system first.
