B05 or MG4? Make your next test drive more specific.
A rattle on your commute, space for your usual bags, or time without a car can change a buying decision. These China-market accounts help you decide what to check on the exact UK cars you are considering.
UK interpretation of China reportsPacket prepared: 26 October 2026Evidence packet: 2026-10-25.1CathayEV editorial
One reported rattle. One important counterexample. A Lafa5 writer described a driver-side rattle on rough roads after more than 3,000 km. They also said the same model at the dealer did not reproduce it.
That gives you a useful test-drive question. It does not establish the cause, how often it happens, or the behaviour of a UK B05. Apply the same listening test to the exact MG4 on your shortlist.
The model-family naming relationship is official. Trim, software, battery, tyres and chassis details still need matching. China Lafa5 Ultra equipment is not the UK B05 specification.
MG4 EV MY26
Our existing B05 comparison uses UK MY26 Premium Long Range. The 2022/2023 China MG4/MULAN accounts below are older vehicles with unmatched conditions.
MG4 Urban
Urban is a separate UK product line. Do not transfer older MG4 experiences or equipment claims to Urban without checking the exact configuration.
No email needed. Start with your UK use and exact MG4 product line. Unknowns stay visible; the result gives you checks to make on both cars.
Six selected records, not a representative sample
What was reported, and what is still missing
Each card keeps the writer’s account, conditions and later status separate from our UK question. We have not independently verified ownership or performed a matched UK road test. These selected records cannot establish population reliability or a UK noise comparison.
China Lafa5 605 Pro (2026); UK B05 equivalence unconfirmed
The writer reports a persistent rattle near the driver's side on poor surfaces, present from delivery and still occurring after a little over 3,000 km. No verified diagnosis is supplied.
UK question
Drive the exact UK B05 over a rough section and compare the demonstrator with your delivery car. If a noise appears, ask the dealer to reproduce and document it before agreeing a repair plan.
Conditions, counterevidence and outcome
Reported conditions
China-market 2026 605 Pro, reportedly built in late 2025.
A few months of use and a little over 3,000 km, according to the writer; poor road surfaces.
The desktop original is dated 19 July 2026; a mobile wrapper showed a different date, so the desktop date is retained.
Counterevidence / other explanation
The same writer says a same-model demonstrator at the dealer did not have the problem. This prevents treating the report as a fault affecting every car.
Outcome
No verified repair outcome. Suggested clips, seals or bushes in replies are unconfirmed diagnoses.
Still missing
Repair order, confirmed cause and a later owner-confirmed outcome.
Road speed, tyre specification, software version and UK component equivalence.
Ownership not independently verified. UK applicability: question only.
China Lafa5 605 Pro (2026); UK B05 equivalence unconfirmed
The writer reports about 13 kWh/100 km in town, roughly 550 km from a full charge, and a 19-minute 30–80% charge. These are individual statements without a charging receipt or a verified full-range test.
UK question
Log the exact UK B05 on your commute: distance, start/end SOC, temperature and metered energy. Use your tariff and measured consumption for a budget; do not copy this China figure.
Conditions, counterevidence and outcome
Reported conditions
China, Shandong; 2026 605 Pro.
Town use in Comfort mode with medium regeneration; a separate 200 km motorway trip reportedly at 110 km/h.
The stated charging window was 30–80%; charger output and temperature were not recorded.
Counterevidence / other explanation
Replies question the motorway result. The dashboard-range change over a trip does not establish independently measured full range.
Outcome
No independent follow-up measurement or charging receipt was established.
Still missing
Temperature, charger output, start/end SOC and charging receipts.
Verified instrument readings, exact route and UK battery/software equivalence.
Ownership not independently verified. UK applicability: question only.
China Lafa5 605 Pro (2026); UK B05 equivalence unconfirmed
A complainant reports intermittent air-conditioning compressor operation and alternating hot/cold air, with repeated checks disrupting work and daily life. The complaint is an allegation, not an independently established defect.
UK question
Ask the UK dealer what happens if repeated visits are needed: diagnosis, parts availability, courtesy-car terms and how unresolved faults are escalated. Check the actual UK agreement.
Conditions, counterevidence and outcome
Reported conditions
China, Chuzhou in Anhui; 2026 605 Pro.
The complainant gives purchase on 13 August 2026, first trouble on 20 August and the first formal inspection on 29 August; these dates are self-reported.
Counterevidence / other explanation
The manufacturer response says contact and communication took place offline. That confirms a response was posted; it does not establish a completed repair.
Outcome
Manufacturer contact reported; final repair and owner-confirmed resolution unknown.
Still missing
Odometer, ambient temperature, diagnostic results and repair paperwork.
Final repair confirmation from the owner and UK service/parts comparability.
Ownership not independently verified. UK applicability: question only.
China original MG4/MULAN 415 km Export Champion (2023); not MG4 Urban
After roughly eleven months and 12,978 km, the writer praises space and handling and says the car suits commuting and longer trips. They also report ordinary sound insulation, conspicuous noise on poor roads and limited infotainment/voice features.
UK question
Try rough roads, voice controls and the items you actually carry in the exact UK MY26 trim. The 415 km China version does not establish MY26 Premium Long Range energy use and says nothing about Urban reliability.
Conditions, counterevidence and outcome
Reported conditions
China, Guangdong; original-family 2023 415 km Export Champion, bought in December 2023 according to the writer.
A parking space where home charging could be installed; Eco mode, adaptive regeneration and stated tyre pressure of 2.4 bar.
Temperature and the split between road types were not recorded.
Counterevidence / other explanation
The same post is positive about space, handling and everyday usefulness. Its energy unit is written inconsistently, so the number is not treated as a verified measurement.
Outcome
No repair record or verified resolution supplied; the post reports an ownership trade-off.
Still missing
Temperature, route split, metered energy and inspected instrument images.
Tyres/software/battery mapping to UK MG4 EV MY26 Premium Long Range; a repair outcome.
Ownership not independently verified. UK applicability: question only.
China original MG4/MULAN 520 km Flagship (2022); not MG4 Urban
After a stated year and two months and 14,630 km, the writer praises rear-wheel-drive behaviour and family space and says a recent service found normal indicators. They report that an early resonance later disappeared, alongside a small boot and disappointing camera clarity.
UK question
Treat this as a useful counterexample to persistent-noise reports. Check your own route, boot load and camera visibility; ask how any demonstrated concern will be diagnosed. A dashboard-range change is not a battery-health measurement.
Conditions, counterevidence and outcome
Reported conditions
China, Dehong in Yunnan; 2022 520 km Flagship, reportedly bought in August 2023.
Convenient home charging; commuting, school runs and shopping, later including 200–300 km trips; regeneration level 3.
The writer says local conditions did not require heated seats or steering wheel; exact temperatures are unknown.
Counterevidence / other explanation
The writer says the early resonance stopped and reports normal service indicators. Neither a workshop report nor a confirmed explanation for that change is available.
Outcome
Writer reports resonance no longer present; cause and any repair remain unknown. Normal service indicators are self-reported.
Still missing
Service paperwork, resonance diagnosis, temperature and speed records.
Metered energy, capacity/SOH testing and exact UK MY26 hardware/software equivalence.
Ownership not independently verified. UK applicability: question only.
China original MG4/MULAN 415 km Export Champion (2023); not MG4 Urban
After a stated near-six months and more than 27,000 km, the writer praises driving enjoyment, linear acceleration and styling. They criticise resonance/tyre noise over speed bumps, boot size and a lower full-charge dashboard range.
UK question
Bring your normal luggage and use a route with speed bumps when trying the exact UK MY26 trim. Do not infer capacity loss from the displayed-range change, or apply the report to MG4 Urban.
Conditions, counterevidence and outcome
Reported conditions
China, Guizhou; 2023 415 km Export Champion.
Frequent rural/county journeys and speed bumps; the writer reports more than 27,000 km over near-six months.
Temperature, start/end SOC and metered energy are not provided.
Counterevidence / other explanation
The same writer remains positive about the driving experience. A separate Yunnan 520 km post (CN-MG4-OLD-002) says early resonance later disappeared; it is a different configuration and circumstance.
Outcome
No verified repair outcome. A reply suggesting an OTA remedy was not supported by repair or follow-up evidence.
Still missing
Noise measurement, repair order and a confirmed later outcome.
Battery capacity/SOH testing and exact UK MY26 hardware/software equivalence.
Ownership not independently verified. UK applicability: question only.
Version 2026-10-25.1, prepared 26 October 2026. First release: six attributed China-market case records, UK applicability questions and a personal checklist. Packet preparation recorded . Retrieval histories are retained separately from original publication dates. The reports do not confirm ownership or a repair. Future corrections and outcome changes will retain these stable case IDs and describe what changed.
Cite or check a record
CathayEV editorial. B05 / MG4 China owner evidence and UK buyer checklist. Evidence packet 2026-10-25.1, 26 October 2026. Link to a case ID on this page and retain its market, version, source date and missing conditions. The source links refer to textual research; this page does not reuse owner photographs, recordings or videos.