CBA-RF4 · UA-RF4
Honda Step WGN RF4 specs
RF4 is the model code of the Honda Step WGN. Japan’s transport ministry lists it in its fuel economy lists from 2004–2005 under 2 model types CBA-RF4, UA-RF4. A genuine car’s chassis number starts RF4-.
RF4 at a glance
- Make
- Honda
- Model
- Step WGN
- Model code
- RF4
- Model types
- CBA-RF4, UA-RF4
- In MLIT’s lists
- 2004–2005
- Engines
- K20A 1,998 cc petrol
- Gearboxes
- 4-speed automatic
- Drive
- four-wheel drive
- Kerb weight
- 1,580–1,650 kg
- Official fuel economy
- 11.6 km/L (33 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.
CBA-RF4
Listed 2004–2005. The CBA prefix (our explanation, not MLIT’s) means petrol passenger car certified to Japan’s 2005 emissions rules, 50% below their limits. Check CBA-RF4 against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| K20A1,998 cc petrol | 4-speed automatic | four-wheel drive | 1,580–1,650 kg | — | 11.6 km/L33 mpg, Japanese 10-15 mode test | 2004–2005 |
UA-RF4
Listed 2004. The UA prefix (our explanation, not MLIT’s) means certified to Japan’s 2000 emissions rules, 75% below their limits. Check UA-RF4 against ULEZ and clean air zones.
| Engine | Gearbox | Drive | Weight | Seats | Fuel economy | Listed |
|---|---|---|---|---|---|---|
| K20A1,998 cc petrol | 4-speed automatic | four-wheel drive | 1,580–1,650 kg | — | 11.6 km/L33 mpg, Japanese 10-15 mode test | 2004 |
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.
Check an RF4 before you buy
Make sure the car is what the advert says: the chassis number on the V5C should start RF4-, 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 Step WGN model codes
- RF3listed 2004–2005
- RF5listed 2004–2005
- RF6listed 2004–2005
- RF7listed 2004–2005
- RF8listed 2004–2005
- RG1listed 2006–2010
- RG2listed 2006–2010
- RG3listed 2006–2010
- RG4listed 2006–2010
- RK1listed 2010–2017
- RK2listed 2010–2017
- RK3listed 2010–2017
- RK4listed 2010–2017
- RP1listed 2016–2022
- RP2listed 2016–2022
- RP3listed 2016–2022
- RP4listed 2016–2022
- RP5listed 2018–2022
- RP6listed 2023–2026
- RP7listed 2023–2026
- RP8listed 2023–2026
Questions
What engine does the RF4 have?
MLIT lists the Honda Step WGN RF4 with K20A 1,998 cc petrol.
What fuel economy does the RF4 get?
Officially 11.6 km/L (about 33 mpg), on Japan’s own tests. Real-world figures are usually lower, especially against the older 10-15 mode test.
How heavy is the RF4?
Between 1,580 and 1,650 kg kerb weight, depending on the version.
Is CBA-RF4 the same as RF4?
Yes. CBA-RF4 is the full model type: the letters before the hyphen are Japan’s emissions code, which changed as the rules were tightened, and RF4 is the model code. The chassis number starts with RF4-.
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.