BYD Dolphin Driver Assistance Warnings: What You Can Actually Turn Off

Quick answer: If you drive an EU-spec BYD Dolphin, the speed limit (ISA) warning can’t be permanently switched off — EU law requires it to return to normal mode at every start, and a Belgian owner confirms it resets each drive. Outside the EU the picture is thinner: reviewers in the UK, Australia and New Zealand describe per-drive switching as routine, but only the EU reset rule is documented. What you can do: swipe down from the top of the screen to open a customizable shortcut menu and add the toggles you reach for most — one New Zealand long-term reviewer added the traffic sign recognition toggle and switches it off in two taps each morning. The owner’s manual also lists the sign-recognition settings under the TSR menu (note: TSR and the ISA overspeed warning are separate functions).

“Can I permanently turn off the speed limit warning?”

Short version: on EU-spec cars, no — and it’s not BYD being stubborn. (Note: this is about ISA, the overspeed warning — a different function from Traffic Sign Recognition, which is the system that reads and displays the signs.)

Since 7 July 2024, EU General Safety Regulation 2 (GSR2) has required every new car sold in Europe to carry Intelligent Speed Assist. The regulation treats ISA as mandatory safety equipment: it must return to its normal operating mode at every start, and drivers can only switch it off temporarily. Belgian owner demille found exactly this on his Dolphin Design: the “blub” noises from speed limit recognition could be silenced, but “every new start one has to redo it; it is ON by default.” (bydowners.com)

Owners in Australia and New Zealand describe related reset behaviour, but the evidence is thinner and less specific than the EU case. Australian outlet tesual notes that Dolphin “settings revert to their default state every time you switch the car off” — a general statement about settings, not ISA specifically. New Zealand reviewer drivelife.co.nz reports lane keeping reactivating at every start. UK reviewers (carwow, evpowered) describe switching the alerts off as a routine part of each drive, without citing a legal reset rule. In short: the EU reset rule is documented; elsewhere, treat per-drive resetting as reviewer-reported behaviour for your market, not a verified rule.

Market difference worth knowing: the two manual versions we could check don’t even agree on the menu structure. The official BYD South Africa manual (Southeast Asia model) puts TSR and the lane systems under ADAS → Driving Assist, while the 2025 online English manual (market version not stated) puts TSR under ADAS → Safety Assist. Neither states a start-up default for TSR. If you’re reading conflicting how-to advice online, the market version and software version are probably why — always verify the path on your own car.

“Why does my Dolphin beep about speed limits when I’m not speeding?”

Several owners and reviewers describe this problem, and the manual itself concedes the point: “The system may fail to or incorrectly identify the sign at night or sunset, in rainy, foggy, hazy, snowy or dusty environment.” In practice, owners report the camera picking up side-road signs, truck speed stickers, or expired school-zone plates — and the car confidently beeping at you for a limit that isn’t real. The New Zealand long-term review puts it bluntly: “there is a very good chance that the Dolphin has a wildly different interpretation of what the speed limit is than you do.” (drivencarguide.co.nz)

One more Dolphin-specific quirk from UK reviewers at drive-electric.co.uk: when you do exceed the limit, you don’t just get a beep — an American-accented voice “will tell you repeatedly” that you’ve exceeded the speed limit.

“How do I turn it off each time without digging through six menus?”

You have two practical options. The first comes from a New Zealand long-term reviewer who needed a faster way after an OTA update made the alerts louder:

1. The two-tap shortcut (one owner’s trick). Swipe down from the top of the main screen to open a customizable shortcut menu. The New Zealand long-term reviewer added the traffic sign recognition toggle to his: each morning, two taps switch TSR off for that drive — no menu diving. He settled on this after an OTA update made the alerts louder (“hellish annoyance,” in his words). Note this is documented for the TSR toggle; we found no source showing a shortcut toggle for the ISA overspeed warning itself.

2. Manage sign recognition from the TSR menu — but know its limits. Two manual versions document different menu structures, so check which matches your car:

• Official BYD South Africa manual (Southeast Asia model): infotainment → ADAS → Driving Assist → Traffic Sign Recognition (TSR). Note that disabling TSR also greys out the Intelligent Speed Limit Control option — the two are linked.
• 2025 online English manual (via manua.ls; the source doesn’t state which market version it is): infotainment → ADAS → Safety Assist → Traffic Sign Recognition → “Speed limit change prompt tone”.

Important: these TSR menus manage sign recognition and its prompt tone — they are not documented as the switch for the ISA overspeed warning itself, which is the separate EU-mandated function discussed above. Don’t assume silencing TSR silences ISA.

“I turned off lane assist, but something is still pulling the steering. What’s the difference with emergency lane assist?”

The Dolphin has two separate lane systems, and owners commonly switch off only one and assume they’re done. UK outlet evpowered.co.uk counted “the minimum of six screen presses it takes to deactivate the lane assist and (entirely separate) emergency lane assist.”

Lane Departure Assistance (LDW/LDP): the official BYD South Africa manual puts it at infotainment → ADAS → Driving Assist → Lane Support System (LSS) (the 2025 online manual instead lists ADAS → Safety Assist → Lane Departure Assistance — check your car). The manual lists three LDW warning modes: audible alarm only, steering wheel vibration only, and combination. Try vibration-only — if the chime bothers you, it’s the quieter option the manual provides.

Emergency Lane Keeping (ELKA): official BYD South Africa manual → ADAS → Driving Assist → Lane Support System (LSS) (the 2025 online manual doesn’t separate it clearly — again, check your car). This is the sharper intervention that yanks the wheel — one Australian reviewer at drivelife.co.nz had to “fight the steering wheel” when the car dragged him back into the lane while he was changing lanes with the indicator on.

A New Zealand reviewer at drivelife.co.nz reports lane keeping reactivating at every start — “it will turn itself back on when you get back into the car” — attributing this to ANCAP-related requirements. (For accuracy: ANCAP is an independent safety ratings body, not a regulator — this is the reviewer’s attribution, not a legal rule we could verify.) Reset behaviour is specified per system, not globally — intelligent cruise control, for example, remembers your last setting: the 2025 manual says ICC “status before the last power-off is maintained,” toggled at ADAS → Driving Assist → Intelligent Cruise Control.

“Can I turn off the driver attention / fatigue monitoring camera?”

Driver attention monitoring falls under the same EU safety framework, and there’s no permanent off-switch that owners have found — which matters, because it’s a sensitive one. Autocar notes “you will want to turn the driver monitoring off, because it can be quite distracting when it bings and bings at you for looking away from the road,” and Auto Express found that glancing at a rear-view mirror or checking a kerb can trigger a loud “Keep eyes on road!” alert. If your Dolphin’s distraction alerts feel excessive, the practical fix is the same as with the speed warning — learn where its toggle lives in the shortcut menu and treat it as part of your startup routine. (Note: the model year, market and software version this shortcut toggle applies to are unverified — if your car doesn’t offer it, that’s normal.)

“Has the new Dolphin G fixed any of this?”

Partially. UK outlet carwow, reviewing the updated Dolphin G, says switching off lane keeping and the speed-limit alerts is now a “two-tap process,” with some toggles pre-placed in the top shortcut bar — “not that intrusive.” Whether these improvements reach older cars via OTA update hasn’t been confirmed, so for 2023–2024 models the manual routine above is still the way.

Quick reference: what stays off and what doesn’t

System	Stays off after restart?	Where to manage it
ISA overspeed warning	No — EU law requires normal mode at every start (EU-spec; Belgian owner confirms per-drive reset)	No documented shortcut toggle; use the car’s per-drive ADAS switches (verify on your car)
Sign recognition (TSR) settings	Neither manual states a start-up default — separate function from ISA; don’t confuse the two	SEA manual: ADAS → Driving Assist → TSR · 2025 online manual: ADAS → Safety Assist → TSR → “Speed limit change prompt tone”
Lane Departure Assistance	NZ reviewer reports it reactivating every start	SEA manual: ADAS → Driving Assist → Lane Support System (LSS) · 2025 online: ADAS → Safety Assist → Lane Departure Assistance
Emergency Lane Keeping (ELKA)	Separate switch from lane assist (UK review); start-up default not documented	SEA manual: ADAS → Driving Assist → Lane Support System (LSS)
Driver attention monitoring	No permanent off-switch found by owners	Shortcut bar for temporary toggle
Intelligent Cruise Control	Yes — 2025 manual: “status before the last power-off is maintained”	ADAS → Driving Assist → Intelligent Cruise Control

Official sources: BYD’s official Dolphin owner’s manual, South Africa edition (Southeast Asia model, hosted on byd.com) — used for TSR/LDA/ELKA paths and LDW modes; 2025 English online manual (via manua.ls, market version not stated) — used for the “Speed limit change prompt tone” item, ISLC grey-out, and ICC start-up statement. Menu structures differ between the two, so verify the path on your own car. EU GSR2 ISA rules: thecarexpert.co.uk explainer and the regulation text at eur-lex.europa.eu. Owner reports from bydowners.com and the New Zealand reviews linked above are owner/reviewer experience, not manufacturer statements or legal rules.

Same ISA headache on a different car? Our MG4 overspeed warning guide covers how MG’s equivalent system behaves and where its off-switch hides.