Windscreen Wiper Arm, Front Passenger Side, For LHD. Porsche 957 Cayenne 2007–10  ›  958955408B

The Porsche Windscreen Wiper Arm 958955408B is a genuine Porsche replacement front passenger-side wiper arm for left-hand-drive Porsche Cayenne models.

Fits:

• Porsche 957 Cayenne 3.0L Diesel 2007-10
• Porsche 957 Cayenne 3.6L 2007-10
• Porsche 957 Cayenne S / GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10  

Correct arm geometry and spring pressure are essential for keeping the blade firmly against the glass and maintaining an effective wiping pattern in rain, road spray and other poor-weather conditions.

What This Product Does:
The windscreen-wiper arm provides the mechanical connection between the wiper spindle and the wiper blade.

Its main functions include:

• Transferring movement from the wiper mechanism to the blade
• Holding the wiper blade against the windscreen
• Maintaining the correct blade angle
• Providing spring pressure across the wiping surface
• Following the curvature of the windscreen
• Keeping the blade correctly positioned when parked
• Supporting reliable windscreen clearing in rain and road spray

The arm itself does not clean the glass; the replaceable wiper blade attached to it provides the wiping edge.

Symptoms Of Wear Or Failure:
Common symptoms of a worn or damaged wiper arm include:

• Wiper blade failing to clear the windscreen evenly
• Large unwiped areas
• Persistent streaking despite fitting a good blade
• Wiper chatter or judderBlade lifting away from the glass
  
• Poor performance at motorway speeds
• Wiper sitting too high or too low when parked
• Arm contacting surrounding trim
• Excessive arm movement on the spindle
• Bent or twisted arm
• Weak spring tension
• Corrosion around the arm or pivot
• Damaged blade attachment point
• Wiper arm becoming loose
• Stripped or worn spindle splines
• Wiper movement becoming out of synchronisation with the other side

A worn blade can create many of the same wiping symptoms, so the blade should normally be inspected first.

Why Replacement Matters:
Reliable windscreen clearing is essential for forward visibility.

A defective wiper arm can prevent even a new blade from making proper contact with the windscreen.

Continued use with a damaged arm may result in:

• Reduced visibility in rain
• Increased driver fatigue
• Poor clearing of road spray
• Wiper blade damage
• Scratching if incorrect components contact the glass
• Additional stress on the wiper linkage
• Incorrect interaction with the driver's-side wiper

Replacing the damaged arm restores the correct mounting geometry and blade pressure.