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Sunsong 3404421 Power Steering Pressure Line Hose Assembly - From Pump (Upper)
BMW Power Steering Pressure Hose
The Sunsong 3404421 power steering pressure line hose assembly is built for direct replacement on select BMW applications, including 2003-2005 BMW 530i and 2004-2005 BMW 525i from the pump (upper) position. It is engineered to meet demanding pressure requirements while restoring proper steering fluid transfer in the power steering system.
- Pressure hose assembly for the power steering pressure line
- Max working pressure: 1,500 psi
- Burst pressure rating: 8,700 psi
- Tensile strength: 1,600 lb
- High-grade steel tubing with zinc electroplating for corrosion resistance
- Precision fit for BMW 525i and BMW 530i applications
- End fittings: 14 mm banjo and 16 mm male
- Hose material: CSM
- Length: 92 in. (2336 mm)
Built For Exact Replacement
This Sunsong power steering pressure line hose assembly is manufactured to exceed original equipment performance standards and is precision engineered for the listed BMW fitments. The hose uses high-grade steel tubing with a zinc coating to help resist rust and corrosion from humidity, road salt, water, and grime. For BMW 530i and BMW 525i owners searching for a power steering pressure hose assembly, part number 3404421 provides a direct-fit solution for the upper line from the pump.
This part cross-references Gates 366286 and MAHLE 55462 for the same application.
Common Problems This Part Can Address
- Power steering fluid leaks at the pressure line
- Loss of steering assist caused by a damaged hose
- Corrosion-related hose deterioration
- Cracked, worn, or weakened pressure tubing
- Improper fit from a previous replacement hose
Installation Notes
Verify the end fittings, hose length, and pump-side routing before installation. This assembly is specified for the from pump (upper) position on compatible BMW applications, so matching the original hose path is important for correct routing and clearance. Inspect surrounding brackets, shields, and connection points during service to confirm the system is ready for reassembly.
Quality Assurance
Each Sunsong 3404421 hose is pressure tested before it leaves the factory to help ensure consistent operation and straightforward installation. The construction and corrosion-resistant tubing are intended to support long service life in demanding underhood conditions.
| Brand | Sunsong |
|---|---|
| Part Number | 3404421 |
| Bracket (Y/N) | N |
| End 1 Fitting Size (mm) | 14 |
| End 1 Fitting Type | Banjo |
| End 2 Fitting Size (mm) | 16 |
| End 2 Fitting Type | Male |
| Hose Material 1 | Csm |
| Length (in) | 92 |
| Length (mm) | 2336 |
| PS Switch Port (Y/N) | N |
| Tech Tip | Tt1000 |
This part fits 5 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2005 | BMW | 525i | From Pump (Upper) | |
| 2005 | BMW | 530i | From Pump (Upper) | |
| 2004 | BMW | 525i | From Pump (Upper) | |
| 2004 | BMW | 530i | From Pump (Upper) | |
| 2003 | BMW | 530i | From Pump (Upper) |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.