5BA-JG4 · 6BA-JG4
Honda N‑ONE JG4 specs
JG4 is the model code of the Honda N-ONE, a kei car. Japan’s transport ministry lists it in its fuel economy lists from 2021–2026 under 2 model types 5BA-JG4, 6BA-JG4. A genuine car’s chassis number starts JG4-.
JG4 at a glance
- Make
- Honda
- Model
- N-ONE
- Model code
- JG4
- Model types
- 5BA-JG4, 6BA-JG4
- In MLIT’s lists
- 2021–2026
- Engines
- S07B 658 cc petrol
- Gearboxes
- CVT automatic
- Drive
- four-wheel drive
- Kerb weight
- 900–920 kg
- Official fuel economy
- 19.8–25.4 km/L (56–72 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.
5BA-JG4
Listed 2026. The 5BA prefix (our explanation, not MLIT’s) means petrol passenger car certified to Japan’s 2018 emissions rules, 50% below their limits. Check 5BA-JG4 against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| S07B658 cc petrol | CVT automatic | four-wheel drive | 900–920 kg | 4 | 23.8–25.4 km/L67–72 mpg, Japanese JC08 test | 2026 |
| S07B658 cc petrol | CVT automatic | four-wheel drive | 900–920 kg | 4 | 19.8–21 km/L56–59 mpg, WLTC test | 2026 |
6BA-JG4
Listed 2021–2025. The 6BA prefix (our explanation, not MLIT’s) means petrol passenger car certified to Japan’s 2018 emissions rules, 75% below their limits. Check 6BA-JG4 against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| S07B658 cc petrol | CVT automatic | four-wheel drive | 900–920 kg | 4 | 23.8–25.4 km/L67–72 mpg, Japanese JC08 test | 2021–2024 |
| S07B658 cc petrol | CVT automatic | four-wheel drive | 900–920 kg | 4 | 20.1–21 km/L57–59 mpg, WLTC test | 2021–2025 |
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.
JG4 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 |
|---|---|
| 2020 | JG4-1000001 to 1000543JG4-2000001 to 2000263 |
| 2021 | JG4-1000544 to 1002262JG4-2000264 to 2000873 |
| 2022 | JG4-1002263 to 1003414JG4-1100001 to 1100561JG4-2000874 to 2001208JG4-2100001 to 2100131 |
| 2023 | JG4-1100562 to 1102595JG4-2100132 to 2100646 |
| 2024 | JG4-1102596 to 1103984JG4-2100647 to 2101083 |
| 2025 | JG4-1103985 to 1104951JG4-1200001 to 1200315JG4-2101084 to 2101340JG4-2200001 to 2200106 |
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 JG4 before you buy
Make sure the car is what the advert says: the chassis number on the V5C should start JG4-, 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 Honda N-ONE model codes
Questions
What engine does the JG4 have?
MLIT lists the Honda N-ONE JG4 with S07B 658 cc petrol.
What fuel economy does the JG4 get?
Officially between 19.8 and 25.4 km/L (about 56–72 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 JG4?
Between 900 and 920 kg kerb weight, depending on the version.
Is 5BA-JG4 the same as JG4?
Yes. 5BA-JG4 is the full model type: the letters before the hyphen are Japan’s emissions code, which changed as the rules were tightened, and JG4 is the model code. The chassis number starts with JG4-.
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 Honda 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.