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FreeCarKits FreeCarKits Guides · Diagrams · Parts Kits
How It Works · FreeCarKits Process Legend

One guide. One kit. One QR code that updates for life.

FreeCarKits pairs every free downloadable build guide and wiring schematic on the site with a curated, ready-to-ship parts kit. No more hunting four forums, three retailers and a YouTube comment section just to swap a starter.

  • 1,840free build guides
  • 312vehicle platforms
  • 14ASE-certified techs
Open printed build guide page on a drafting table.
Sample guide · 1968 Camaro alternator swap · Rev. 07
Pre-bagged FreeCarKits parts tray with labeled foam compartments. Pre-Bagged Kit · SKU FCK-1784
218,000+ kits shipped since 2019 · 1,840 free build guides live · 312 vehicle platforms covered · 94.7% kit-fitment accuracy rate · 4.86/5 average post-install rating · 14 ASE-certified technicians on staff · Featured: AutoWeek Best DIY Resource 2024 ·
The Four-Step Process

From spark plug to shipped kit in four steps.

Every FreeCarKit follows the same legend — pick your platform, pull the free schematic, receive a pre-bagged box, scan the QR for life. Read it once; you'll see the rhythm on every build from here on.

  1. 01 Step One · Platform

    Pick your platform.

    Year-make-model filter on the FreeCarKits catalog.

    Filter the free guide library by year, make, model and engine. From a 1965 Ford Mustang to a 2024 Toyota Tacoma — 312 platforms covered, with 89% OEM-manual-sourced wiring for the top-50 US-market vehicles.

    • · 1,840 guides live in Q1 2025
    • · Free PDF + schematic download
    • · No email gate to preview
  2. 02 Step Two · Schematic

    Download the free guide.

    Printed wiring schematic on a clipboard.

    Pull the peer-reviewed build guide and matching schematic right now — no checkout, no email form. It includes the BOM, torque specs, wire colors and the gotchas our tech team flagged during the bay install.

    • · Peer-reviewed by 14 ASE techs
    • · Includes parts BOM
    • · Torque specs inline
  3. 03 Step Three · Shipment

    Kit ships, pre-bagged.

    Open FreeCarKits shipping box with labeled foam parts tray.

    If you want the parts, we ship the kit — pre-counted, pre-bagged, labeled. No SKU hunting across nine retail sites. Every part carries our free replacement guarantee on fitment.

    • · 94.7% fitment accuracy
    • · Free replacement guarantee
    • · Ships from Boulder, CO
  4. 04 Step Four · Revision

    QR pulls lifetime revisions.

    QR code sticker on a kraft-paper instruction sheet.

    Every kit ships with a QR sticker. When a part gets superseded or a torque spec gets corrected, the latest revision of your guide is one scan away — for the life of the build. No newsletter signup, no app.

    • · Lifetime free revisions
    • · No app or login required
    • · Always-dated Rev. number
Who Wrote This

“Every guide on FreeCarKits is written by an ASE-certified technician who has actually turned the wrenches on that platform — not crowdsourced from a forum post in 2011. Fourteen of us, 154 years in the bay combined, and 1,840 guides reviewed.”

Renata Okafor ASE Master Tech · Co-founder, FreeCarKits Inc.
  • 14ASE-certified technicians on staff
  • 154 yrscombined bay experience
  • 1,840free guides reviewed & live
  • 312vehicle platforms covered
Open FreeCarKits box showing foam parts tray with torque-spec card.
Box · physical kit · SKU FCK-1784
Physical · What's in the box

What's in the box.

  • Pre-bagged parts kit. Every fastener, terminal and connector counted and labeled — no SKU hunting, no missing M6 washers at 10pm.
  • Torque-spec callout card. Laminated card with the bolt-by-bolt torque values printed from the same spec sheet used in our build review.
  • Lifetime-revision QR sticker. Peel-and-stick. Scans to the latest revision of your guide for as long as the build is on the road.
  • Free replacement guarantee. If a part in the kit doesn't fit on first install, we replace it — no restocking fee, no return label hunt.
Digital · What's in your inbox

What's in your inbox.

  • PDF build guide. Step-by-step with photo callouts, written by an ASE-certified tech who has done this exact job on this exact platform.
  • OEM-sourced schematic. Wiring diagram drawn from the factory service manual — not crowd-submitted — covering the 89% of top-50 US-market vehicles we map.
  • BOM spreadsheet. Line-itemed parts list with cross-references to the kit SKUs in the box, so you can re-order single items later.
  • Revision-notice emails. Only when your specific guide is updated. Opt-out is one click; we don't sell the list.
PDF schematic on a laptop next to a kraft-paper envelope.
Inbox · PDF guide + schematic + BOM
Lifetime Revisions · Real Examples

Rev 04. Update pushed Tuesday. You didn't have to do anything.

The QR-code promise isn't marketing copy. Here are three real revision notices our team pushed in the last two quarters — the kind of thing that used to live buried in a forum thread nobody could find.

Rev. 07 → Rev. 08

2017 Subaru Outback · Trailer Harness Routing

What changed: Curling harness path around the rear subframe — our install team caught an abrasion risk against the rear sway-bar endlink on 2017 models with the factory tow package.

  • Pushed: 14 Mar 2025
  • Trigger: in-house bay reinstall
  • Affected SKUs: FCK-1142, FCK-1143
Revision notice page for the 2017 Subaru trailer harness guide.
Rev. 02 → Rev. 03

2004 Ford F-150 · Dual-Battery Setup

What changed: Torque spec on the battery hold-down bracket corrected from a generic 18 ft-lb to the 2004 FSM-stated 35 in-lb — to prevent cracking the plastic tray.

  • Pushed: 28 Jan 2025
  • Trigger: OEM service-manual cross-check
  • Affected SKUs: FCK-0418
Torque spec correction highlighted on the F-150 dual-battery guide.
Rev. 11 → Rev. 12

2012 Honda Civic · Starter Replacement

What changed: Replacement starter motor superseded (Denso 280-0322 → 280-1144). Updated SKU cross-reference, kit bag reprinted for any new order, no action needed for past buyers.

  • Pushed: 06 Feb 2025
  • Trigger: parts supersession
  • Affected SKUs: FCK-0031
Old and new replacement starter motors on a workbench.

Every revision is dated. You can pull the entire changelog for your build by scanning the QR sticker in the kit — no login, no email signup.

By the Numbers

What 218,000 shipped kits have taught us.

We're a small team in Boulder with fourteen techs in the bay and one promise: if a guide is on this site, it's been turned on a lift. Here's the scoreboard since we opened the doors in 2019.

218,000+ parts kits shipped since launch Verified · FreeCarKits internal fulfillment log, Q1 2025
4.86 / 5 average post-install rating Verified · all submitted verified-buyer reviews
94.7% kit-fitment accuracy rate Verified · backed by our free replacement guarantee
$186 average project savings vs. retail Survey-derived · shopper savings across 9 tracked retailers
  • AutoWeekBest Free DIY Auto Resource 2024 · Gear Guide, Apr 2024 issue p. 62
  • Grassroots MotorsportsCited as a top resource · Nov 2023
  • Hot Rod MagazineCited as a top resource · Mar 2024
  • The DriveFeatured in 2024 Buyers Guide