Methodology and sources

Sources

• Owner's manuals (533 manuals read, checked 2026-10-20). Each comes from the automaker's own site: GM (chevrolet.com, gmc.com), Ford (fordservicecontent.com), Toyota (assets.sia.toyota.com), Honda (techinfo.honda.com), Nissan (nissanusa.com), Mazda (mazdausa.com web manuals), Kia (ownersmanual.kia.com), Hyundai (owners.hyundaiusa.com) and Tesla (tesla.com). Every vehicle page links the manual it was read from.
• Battery group sizes: Battery Council International, BCI Group Sizes (Oct 2023 PDF), checked 2026-10-20. Maximum overall dimensions, terminal types, OE cold-cranking ranges, and BCI's own best-fit tables between BCI groups and DIN/EN and JIS case codes. Re-typed into this site's own table; no BCI figures or images are reproduced.
• Model generations: Wikipedia articles for each model, linked on the year pages, used only to say which generation a year belongs to.

Sources by maker

How a manual is read

1. The manual PDF (or the maker's web edition) is downloaded once and converted to text with page breaks kept, so every fact keeps its PDF page number.
2. The pages that hold parts facts are located by their headings and content: parts tables, bulb charts, battery and capacity specifications, wiper sections.
3. Each printed value is copied with its page number: wiper lengths in the unit printed, bulb numbers as printed (suffixes such as NA or LL kept), battery codes, filter part numbers and oil grade and capacity. Values that are not printed are recorded as not printed. Nothing is filled in from parts catalogs, retailer lookups or general knowledge.
4. Where a two-column page makes the pairing of a label and value unclear, the row carries a note saying so.

Checking

After extraction, an automated check looked for every copied value (bulb numbers, wiper lengths, filter and wiper part numbers, battery codes) on the PDF page it cites. On 2026-10-20, 2645 of 2655 values were found on their cited page. The 10 not matched literally are two codes joined into one value (for example LN2 / LN3) or a suffix printed on the next line; each was checked by hand. Values from web manuals (Mazda, Kia, Tesla) are copied from the cited web page and were not part of the automated page check.

Kia web manuals added 2026-10-21

Kia publishes its US owner's manuals as web pages, one topic per page. For each model year the manual's contents page was opened to find its "Bulb wattage" page, and that page's table was copied row by row (position, Type A/B trim variant, bulb number as printed, wattage as printed; interior lamps left out). Kia's web manuals do not print the model name, only a platform code in the address (DL3, KA4, SK3, SG2 and so on), so each new code was matched to its model by the manual's own Dimensions page (for example, the KA4 manual prints a 5,155 mm, 7/8-seat body with sliding doors: the Carnival). Each bulb row links the Kia page it was copied from. The raw rows are kept with the site's research files.

These tables were read through a web reader rather than downloaded in bulk, so they are not part of the automated page check above. Where a table's layout left a row's label unclear, the label is copied as printed (the 2023–2024 Telluride lists its PY21W under "Back up lamp (LED type only)") rather than corrected. Kia prints some numbers in its own style (21/5W rather than P21/5W, W5W LL); those are shown as printed and are not merged into another bulb page.

Derived values

• Wiper size sold: blade makers step sizes by 25 mm per nominal inch, so the sold size is the printed length in mm divided by 25, rounded (600 mm → 24 in). The exact inch length (mm ÷ 25.4) is shown alongside.
• Battery group from a code: a Ford BXT or BAGM code embeds the BCI group (BXT-65 → group 65). A DIN/EN case (LN3, H6) or JIS code (55D23L) is shown with the groups BCI lists as best fit; that is BCI's mapping, not the automaker's.
• Bulb families: bulb pages group printed numbers by base number (7443NA and 7443 under 7443). Equivalent names (921 and W16W) are shown only where a manual prints them together.
• Wiper size pages: listings are grouped by the whole-inch size sold. A size gets its own page when at least 2 models and 8 model-year listings print it; every other size is listed in the wiper sizes table only.
• Tray fit checker: a group fits when its maximum length, width and height are each no larger than the space you measured.

Photos

Car photos come from Wikimedia Commons under free licences (CC0, public domain, CC BY or CC BY-SA), resized and hosted here, with the photographer and licence under each picture. A model-year page shows a photo only when it is of that generation; otherwise it shows a drawing. The drawings, charts and numbers are this site's own.

What is not covered yet

Stellantis (Ram, Jeep) and Subaru manuals could not be read automatically from the makers' sites, so those models are not on the site yet. Some 2023–2026 Ford and Hyundai years, and a few short-print Toyota manuals, are also missing. Model years are added as their manuals are read. Looked for and left out so far:

• Kia Sportage 2026, Kia Telluride 2026: No en_US web manual found on ownersmanual.kia.com under the NQ5/ON codes (fetch errors); not added.
• Kia K5 2021-2024: ownersmanual.kia.com DL3/2023 and DL3/2024 en_US return errors; only 2025 and 2026 were readable.
• Kia Forte 2023: No en_US web manual found under BDm/2023.
• Kia Soul 2020-2021, Carnival before 2022, Niro before 2024: Not attempted in this wave (search budget); pre-facelift tables differ, so later years were not copied back.
• Kia K4 2025-2026, Seltos 2022: Manual read, but every exterior lamp is LED or fewer than three bulb numbers are printed, so no page is built.
• Hyundai Tucson, Santa Fe, Elantra, Palisade 2024-2026: ownersmanual.hyundai.com pages render with JavaScript (WebFetch sees an empty template); search only returned general-market (en_GN) editions, which are not US manuals.
• Chevrolet/GMC 2025-2026 (Silverado, Sierra, Equinox, Traverse), Toyota RAV4/Camry 2026, Honda 2022+: Full-size PDFs (400-700 pages) are beyond what WebFetch can read reliably; they need the bulk PDF pipeline on the owner's Mac. Earlier extraction found no parts table in the GM 2025-2026 manuals.
• Mazda 2022-2026: Web manuals read in the build; exterior lamps are LED and no wiper or filter part numbers are printed, so no page qualifies.
• Ram, Jeep, Subaru: Out of scope for this wave (manuals need a browser or a login).

This site is not affiliated with any automaker. Model names belong to their owners.