Windscreen Wipers: How Long They Last and How to Replace Them

What Do Windscreen Wipers Do?

Windscreen wipers clear rain, mist, snow, and road grime from your windscreen to maintain visibility while driving. Each wiper consists of a wiper arm (the metal arm powered by the wiper motor) and a wiper blade (the rubber squeegee element that contacts the glass).

The wiper motor is driven by the car's electrical system and activated by the wiper stalk on the steering column. Most cars offer intermittent (variable speed), low, high, and wash-and-wipe settings. Many modern cars also feature rain-sensing wipers that use a sensor to detect rain on the glass and activate automatically.

Rear wipers are fitted to most hatchbacks, wagons, and SUVs — these require the same maintenance as front wipers.

How Long Do Wiper Blades Last?

Wiper blades are consumable items. In NZ, the typical lifespan is 6–12 months for standard rubber blades, and 12–24 months for premium silicone blades. Factors that accelerate wear:

• UV exposure — NZ's UV index is among the highest in the world. Rubber degrades rapidly when parked in direct sun
• Salt air — coastal environments (Auckland, Wellington, Napier) accelerate rubber hardening
• Infrequent use — blades left in the same position develop a flat spot and hardened contact edge
• Using dry wipers — never run the wipers on a dry windscreen; this shreds the rubber edge

Signs Your Wiper Blades Need Replacing

• Streaking — the blade leaves bands of water on the glass rather than clearing cleanly
• Smearing — water is spread in a thin film rather than being cleared
• Squeaking or chattering — the rubber is hard or damaged, bouncing across the glass
• Skipping — the blade lifts from the glass over bumps or curves in the windscreen
• Visible damage — tears, cracks, or separation of the rubber from the blade frame
• Missing sections — pieces of rubber are completely gone (common after frost or impact)

If your wipers are leaving any smear in the driver's line of sight in moderate to heavy rain, they need replacing immediately. Poor forward visibility in NZ's frequent rain events is a genuine safety risk.

Types of Wiper Blades

Beam blades are increasingly fitted as OEM on modern NZ cars (Toyota, Mazda, Subaru) and are recommended as replacements for best performance. Silicone blades are an excellent choice for NZ given our UV environment.

Can You Replace Wiper Blades Yourself?

Yes — this is one of the easiest DIY car maintenance tasks. Most wiper blades attach to the wiper arm via a hook-and-pin or pinch tab connector. The process:

1. Lift the wiper arm away from the windscreen (it will stay upright)
2. Find the release tab or pin on the blade connector
3. Press or slide it to release the blade from the arm hook
4. Slide the new blade onto the hook until it clicks
5. Lower the arm gently back to the glass

Many auto parts retailers (Repco, Supercheap Auto) will fit blades for free with purchase. If you're unsure of the correct size, check the fitment guide (your registration plate or VIN will identify the correct blades).

Note: Always check both the driver's side, passenger side, and rear wiper (if fitted) — they are often different sizes.

WoF and Wiper Blades

WoF inspectors assess wiper blades by operating them. A wiper blade that:

• Does not clear the glass adequately (streaks badly)
• Is visibly damaged or missing sections
• Does not make proper contact across its sweep

...will fail a WoF inspection. This is a simple, inexpensive fix — there is no excuse for failing a WoF on wiper blades.

How Much Do Wiper Blades Cost in NZ?

When to Replace

Replace wiper blades:

• Once a year as a minimum — ideally before the NZ winter when rain is most frequent
• Immediately if you notice any streaking or smearing during rain
• Before your WoF if they have not been replaced in the past year

Further Reading

• Find a mechanic near you
• Windscreen: Chips, Cracks, and When NZ Law Says You Must Replace It
• Car Dashboard Warning Lights: What Every Light Means in NZ