3BA-HB37S
Mazda Carol HB37S specs
HB37S is the model code of the Mazda Carol, a kei car. Japan’s transport ministry lists it in its fuel economy lists from 2023–2026 under the model type 3BA-HB37S. A genuine car’s chassis number starts HB37S-.
HB37S at a glance
- Make
- Mazda
- Model
- Carol
- Model code
- HB37S
- Model types
- 3BA-HB37S
- In MLIT’s lists
- 2023–2026
- Engines
- R06A 658 cc petrol
- Gearboxes
- CVT automatic
- Drive
- four-wheel drive, front-wheel drive
- Kerb weight
- 680–740 kg
- Official fuel economy
- 23.5–29.4 km/L (66–83 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.
3BA-HB37S
Listed 2023–2026. The 3BA prefix (our explanation, not MLIT’s) means petrol passenger car certified to Japan’s 2018 emissions rules. Check 3BA-HB37S against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| R06A658 cc petrol | CVT automatic | four-wheel drive | 730–740 kg | 4 | 28.7 km/L81 mpg, Japanese JC08 test | 2023–2026 |
| R06A658 cc petrol | CVT automatic | four-wheel drive | 730–740 kg | 4 | 23.5 km/L66 mpg, WLTC test | 2023–2026 |
| R06A658 cc petrol | CVT automatic | front-wheel drive | 680–690 kg | 4 | 29.4 km/L83 mpg, Japanese JC08 test | 2023–2026 |
| R06A658 cc petrol | CVT automatic | front-wheel drive | 680–690 kg | 4 | 25.2 km/L71 mpg, WLTC test | 2023–2026 |
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.
HB37S 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 |
|---|---|
| 2021 | HB37S-100001 to 100007 |
| 2022 | HB37S-100008 to 101944 |
| 2023 | HB37S-101945 to 104743HB37S-160001 to 160192 |
| 2024 | HB37S-160193 to 162582 |
| 2025 | HB37S-162583 to 163633HB37S-210001 to 211524 |
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 an HB37S before you buy
Make sure the car is what the advert says: the chassis number on the V5C should start HB37S-, 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 Mazda Carol model codes
Questions
What engine does the HB37S have?
MLIT lists the Mazda Carol HB37S with R06A 658 cc petrol.
What fuel economy does the HB37S get?
Officially between 23.5 and 29.4 km/L (about 66–83 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 HB37S?
Between 680 and 740 kg kerb weight, depending on the version.
Is 3BA-HB37S the same as HB37S?
Yes. 3BA-HB37S is the full model type: the letters before the hyphen are Japan’s emissions code, which changed as the rules were tightened, and HB37S is the model code. The chassis number starts with HB37S-.
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 Mazda 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.