OEM-grade coolant return hose designed to connect the oil cooler to the water pipe, ensuring stable engine temperatures and a reliable seal.
$6.86
Out of stock
The 058 121 058B oil cooler hose serves as a critical connection between the oil cooler and the coolant return pipe. This hose facilitates the return of coolant back into the main cooling circuit, ensuring that heat remains property regulated within the engine’s lubrication and cooling systems.
Rubber components in the engine bay eventually degrade because of intense heat cycles, pressure fluctuations, and chemical exposure. Consequently, the hose may develop cracks or internal swelling that restricts flow, potentially compromising engine cooling efficiency and increasing the risk of overheating.
Maintaining a consistent flow of coolant through the oil cooler return path is essential for stabilizing engine temperatures. When the hose deteriorates, it can leak or collapse, causing the cooling system to lose pressure. Restoring this connection with an OEM-grade part helps maintain a secure seal and protects internal engine components from thermal stress.
Replacing aged hoses before they fail is a proactive way to avoid roadside breakdowns. Furthermore, using a direct-fit replacement ensures the routing matches factory specifications, preventing interference with other engine-bay components.
Monitor your vehicle for these symptoms of a failing coolant return hose:
Visible surface cracking or “checking” on the rubber.
Bulging or swelling near the connection points.
Soft spots that feel spongy compared to the rest of the hose.
Dried coolant residue (crusty pink or orange deposits) around the oil cooler.
Gradual drop in coolant levels without an obvious external leak.
Rising engine temperatures or overheating warnings.
Always inspect the hose for pliability. If the material feels excessively stiff or brittle, its structural integrity is likely compromised and it should be replaced.
OE Part Number: 058 121 058 B
Function: Connects the engine oil cooler to the return water pipe.
Material: High-temperature resistant rubber designed to withstand cooling system pressures.
Direct Fit: Precision molded to match the factory bends and connection sizes.
Direct Replacement: Replaces the original equipment without requiring additional modifications.
Durability: Built to resist long-term exposure to engine oil and automotive coolants.
Always verify fitment by VIN before ordering.
058 121 058 B
058121058B
058-121-058-B
058.121.058.B
| Weight | .20 lbs |
|---|---|
| Dimensions | 9 × 7 × 3 in |
| Mfg Part # | 058121058B |
| Year | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 1997-2000 | Audi | A4 | 1.8L | |
| 1998-2001 | Volkswagen | Passat | 1.8L | |
| Audi | B5 A4 | 1.8T | Use vehicle selector to confirm fitment | |
| Volkswagen | Passat B5 | 1.8T | Use vehicle selector to confirm fitment |
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