Independent vehicle research · global scope

One boxer engine. Two very different tribes.

An aircraft company built the first Subaru. A rally program built the WRX. A dog-loving, mountain-state owner base built the reputation. SubaruFacts follows the evidence across every era, every market, and both halves of Subaru's split personality.

WRX Symmetrical AWD Outback

Nakajima Aircraft Company head office building, Taisho era
Field note 01 Nakajima Aircraft Company's head office — decades before the first Subaru 360 ever ran.

Vehicle families

One marque, thirteen very different lineages.

A kei car is not a WRX. A Baja is not a Tribeca. An Outback isn't just a raised Legacy anymore, even though it started as one. The catalog keeps every boundary and every chassis code visible.

  1. 01
    360 & Kei-Car Lineage

    Japan's first mass-produced kei car and the small-displacement lineage that followed it — the 360, R-2, Rex, Sambar, Vivio, and Pleo — almost entirely a JDM story, with the 360's brief and famously rocky US import chapter as the exception.

    1958–2010s
  2. 02
    Legacy

    Subaru's first "world car" mid-size sedan/wagon, the platform STI's very first prepared car (the Legacy RS-RA) was built on, and the vehicle behind Subaru's 1989 Arizona endurance speed record.

    1989–present
  3. 03
    Outback

    Began as a raised, cladded Legacy wagon trim before becoming its own model line — a genuine "crossover before crossovers" story Subaru itself has credited with helping save the company during a difficult early-1990s stretch.

    1994–present
  4. 04
    Impreza, WRX & STI

    Subaru's rally-homologated performance icon, built to satisfy World Rally Championship Group A/N rules, and the single family with the deepest JDM-vs-US divergence in the whole marque — from the WRX/STI US introduction gap to a long list of JDM-only limited editions like the 22B.

    1992–present
  5. 05
    Forester

    A taller, more car-like AWD wagon launched before "crossover" was an established category — a genuine early-mover story, plus the SG-generation turbo XT and the JDM-only Forester STi.

    1997–present
  6. 06
    Crosstrek / XV

    An Impreza-based lifted crossover that became Subaru's entry-level adventure vehicle, with a brief transitional "XV Crosstrek" US badge before "XV" was dropped for MY2016.

    2012–present
Open all vehicle families
Beyond the model catalog

Six ways into the archive

1953 → present

One continuously-owned marque. A corporate story that still surprises people.

Fuji Heavy Industries, a GM stake, a Toyota alliance, and a 2017 rename to Subaru Corporation — the ownership history is calmer than Jeep's, but the aircraft-to-automaker throughline rarely makes it into a brochure.

Walk the corporate timeline →

Across the archive

Latest field notes

Research breadth beyond the model-year spec sheet.

Corporate origin

An aircraft company built your Outback.

Subaru's corporate lineage traces to Nakajima Aircraft Company, a WWII-era Japanese aircraft manufacturer dissolved after the war and reorganized into successor companies that eventually merged in 1953 to form Fuji Heavy Industries — the company that introduced the Subaru brand five years later with the 1958 Subaru 360.

disputed evidence · partial coverage

Engineering identity

One engine layout, almost the whole lineup.

Subaru did not invent the horizontally-opposed "boxer" engine, but it built its brand identity and nearly its entire modern lineup around one — paired with Symmetrical All-Wheel Drive since 1972. It's the single technical fact that unites Subaru's two very different enthusiast cultures: WRX/STI tuner culture and Outback/Forester adventure-wagon owners alike can recite it.

settled evidence · partial coverage

Controversy

The EJ25 head-gasket question, honestly unresolved.

A widely-repeated enthusiast claim holds that naturally-aspirated EJ25 engines (Legacy, Outback, Forester, Impreza, Baja) are prone to head-gasket failure. The pattern is real enough to appear consistently across repair-trade-press sources, but this project has not yet found a primary Subaru TSB, an NHTSA complaint-database query, or an independent engineering study to quantify it — so it stays labeled provisional rather than promoted to settled fact.

provisional evidence · partial coverage

People, not mythology

Kita named it. Momose engineered it. Bricklin imported it.

Subaru's history is full of famous marketing lines. The actual work is full of less-famous engineers, executives, and one very colorful US importer.

Meet the people behind the machines →
Start here

Research snapshot · 23 July 2026

Split personality, one spine

The engineering fact under every argument.

NASIOC and Rebelle Rally forums barely overlap. A WRX owner and an Outback owner might disagree about almost everything else. But both can tell you their car has a boxer engine and Symmetrical AWD — the one fact this archive treats as the spine of the whole marque.

Read the engineering throughline