Methodology

How CarPartSizes checks wiper blade sizes

CarPartSizes is built for one job: help you confirm driver, passenger, rear blade, connector, and source notes before you buy. We publish the answer when the useful facts are backed by source checks, and we label uncertainty when a field is not settled.

What a fitment page needs to answer.

A useful wiper size page is not just one number. It should separate the fitment answer from caveats, source notes, and retailer links so you can make a cleaner purchase decision.

Driver and passenger size We separate the front blade sizes so users can confirm both sides before buying.

Rear blade status If a vehicle may have a rear wiper, we look for explicit rear blade evidence instead of assuming.

Connector notes We show connector details when they are supported, and mark them as not verified when they are not.

Confidence and caveats Each fitment page keeps uncertainty visible instead of turning a weak source into a hard answer.

Source types we check.

We do not treat every source equally. OEM and wiper-brand fitment information carries more weight than broad marketplace listings, but several source types can help confirm the same vehicle record.

Source trail Public summary

Owner manual and OEM parts pages Best for exact vehicle instructions, rear blade notes, and official part context.

Wiper brand fitment tools Bosch, Rain-X, TRICO, and similar fitment guides help cross-check blade sizes.

Retailer fitment pages AutoZone, O'Reilly, NAPA, Advance Auto, and other fitment pages help confirm what is sold for the vehicle.

Marketplace fitment signals Amazon Confirmed Fit and similar marketplace signals may support a record, but they do not replace stronger sources.

Confidence labels

We show the state of the answer, not just the answer.

Fitment data can change by year, trim, market, and production date. The status label tells us whether a record is ready to answer directly or should stay in review instead of becoming an indexable exact page.

No guessing. Missing rear blade or connector evidence stays visible instead of being filled in by assumption.

Verified: Core fitment fields are supported by source checks, and the exact page can give a direct answer.
Needs review: Useful core data exists, but one or more fields still need stronger confirmation and must stay visibly labeled on the page.
Conflict: Credible sources disagree. Unresolved conflict records are held out of indexable exact pages until the source pack is resolved.

What we do not claim.

CarPartSizes gives source-backed fitment information, not a purchase guarantee. Before checkout, match the result against your owner manual, vehicle trim, and the retailer fitment tool for the exact product you plan to buy.

No VIN or license plate lookup We use year, make, and model pages, not private vehicle identifiers.

No repair advice We focus on consumable fitment data, not diagnosis or installation instructions.

No hidden retailer ranking Retailer links are separate from the fitment answer and should not change the stated size.

No invented fitment fields If rear blade or connector details are not confirmed, the page should say so.

Keep checking from the source trail.

Browse all lookups ->

How to measure wiper blades Guide Rear wiper blade guide Guide Wiper connector types Guide