TOYOTA 90311-70011 Wheel Hub Oil Seal

The genuine OEM Toyota 90311-70011 part is a premium-quality wheel hub oil seal (shaft seal) designed to ensure proper lubrication of the wheel hub bearing and protect it against external contaminants. Manufactured to Toyota's strict factory specifications, this "Type T OI" radial shaft seal guarantees a perfect fit and long-lasting durability.

Technical Specifications and Features:

• Type: Type T OI (radial oil seal equipped with a specialized dust lip design).
• Application: Wheel hub seal that prevents bearing grease or gear oil leakage while keeping out water, dust, and road dirt.
• Material: High-grade, wear-resistant, and heat-resistant elastomer engineered to withstand high operating temperatures and the chemical exposure of lubricants.
• Design: Sealing lip with an integrated garter spring to maintain continuous and uniform radial sealing pressure.

Function and Symptoms of Failure:

The wheel hub oil seal serves as a critical line of defense in the suspension and chassis assembly. When the seal fails, lubricant quickly escapes from the bearing, leading to dry running, overheating, and ultimately premature—and potentially hazardous—wheel bearing failure.

Typical Signs of Wear or Damage:

• Oil or grease spots appearing on the inner side of the wheel hub or on brake system components.
• Excessive dust and grime buildup around the seal area caused by leaking lubricant.
• Grinding or friction noises coming from the wheel bearing, indicating inadequate lubrication.

To ensure road safety and prevent expensive suspension repairs, a damaged or leaking oil seal should be replaced immediately, preferably alongside a thorough inspection of the wheel bearing.