4BA-BS9 · DBA-BS9
Subaru Legacy BS9 specs
BS9 is the model code of the Subaru Legacy. Japan’s transport ministry lists it in its fuel economy lists from 2015–2025 under 2 model types 4BA-BS9, DBA-BS9. A genuine car’s chassis number starts BS9-.
BS9 at a glance
- Make
- Subaru
- Model
- Legacy
- Model code
- BS9
- Model types
- 4BA-BS9, DBA-BS9
- In MLIT’s lists
- 2015–2025
- Engines
- FB25 2,498 cc petrol
- Gearboxes
- CVT automatic
- Drive
- four-wheel drive
- Kerb weight
- 1,570–1,610 kg
- Official fuel economy
- 12.6–14.8 km/L (36–42 mpg)
Fuel economy is from Japan’s official tests and is usually better than you’ll see on UK roads. MLIT doesn’t list power or torque.
4BA-BS9
Listed 2021–2025. The 4BA prefix (our explanation, not MLIT’s) means petrol passenger car certified to Japan’s 2018 emissions rules, 25% below their limits. Check 4BA-BS9 against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| FB252,498 cc petrol | CVT automatic | four-wheel drive | 1,570–1,600 kg | 5 | 14.3 km/L40 mpg, Japanese JC08 test | 2021–2025 |
| FB252,498 cc petrol | CVT automatic | four-wheel drive | 1,570–1,600 kg | 5 | 12.6 km/L36 mpg, WLTC test | 2021–2024 |
DBA-BS9
Listed 2015–2020. The DBA prefix (our explanation, not MLIT’s) means petrol passenger car certified to Japan’s 2005 emissions rules, 75% below their limits. Check DBA-BS9 against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| FB252,498 cc petrol | CVT automatic | four-wheel drive | 1,570–1,610 kg | 5 | 14.6–14.8 km/L41–42 mpg, Japanese JC08 test | 2015–2020 |
Each row is one version as MLIT lists it. A version can appear twice when MLIT gave figures on two tests that year. Low-emission stars and trim names aren’t shown. MLIT gives fuel economy in km/L; the mpg figures are our conversion to UK gallons. Japanese tests are gentler than real UK driving, so expect less.
BS9 build year by chassis number
Japan’s carmakers list the chassis numbers each code was built with every year from 2015. Find the serial below, or use the build year finder.
| Built | Chassis numbers |
|---|---|
| 2015 | BS9-004877 to 012978BS9-017001 to 020574 |
| 2016 | BS9-020575 to 026687BS9-030004 to 032991BS9-032994 to 032995 |
| 2017 | BS9-030001 to 030003BS9-032992 to 032993BS9-032996 to 037872BS9-043007 to 046053BS9-046055 to 046058 |
| 2018 | BS9-046054 to 046054BS9-046059 to 049795BS9-052002 to 054006 |
| 2019 | BS9-054007 to 056557BS9-059001 to 060543 |
| 2020 | BS9-060544 to 061796BS9-064002 to 065012 |
| 2021 | BS9-064924 to 064924BS9-065013 to 065192 |
From the JAMA chassis number lists: 車台番号一覧表. We keep only the chassis code, serial ranges and year. JAMA calls them reference information, not a certificate.
Check a BS9 before you buy
Make sure the car is what the advert says: the chassis number on the V5C should start BS9-, and the engine and gearbox should match one of the versions above. Our free check reads the UK MOT history and compares it with the chassis code.
Other Subaru Legacy model codes
Questions
What engine does the BS9 have?
MLIT lists the Subaru Legacy BS9 with FB25 2,498 cc petrol.
What fuel economy does the BS9 get?
Officially between 12.6 and 14.8 km/L (about 36–42 mpg), depending on the version, on Japan’s own tests. Real-world figures are usually lower, especially against the older 10-15 mode test.
How heavy is the BS9?
Between 1,570 and 1,610 kg kerb weight, depending on the version.
Is 4BA-BS9 the same as BS9?
Yes. 4BA-BS9 is the full model type: the letters before the hyphen are Japan’s emissions code, which changed as the rules were tightened, and BS9 is the model code. The chassis number starts with BS9-.
About these figures
The model types, engine codes, capacities, gearboxes, drive, weights, seats and km/L figures are copied from MLIT’s yearly lists of cars on sale in Japan each March, so “listed” years are list years, not exact production dates. The English model names, mpg conversions, emissions code explanations and chassis number matching are ours. Lists before 2013 were printed as PDFs that we read by machine; where an older list gives an engine code that doesn’t match its capacity, we’ve used the figure the same model type has in other years. Check anything that matters against the car’s own papers. Spotted a mistake? Email [email protected]. All Subaru model codes.
Source: Ministry of Land, Infrastructure, Transport and Tourism (MLIT), Japan, fuel economy lists 2004–2026, used under the Public Data License 1.0. Edited and translated by JDM History.