BYD SEAL: Falling coolant level; check for system leaks

BYD SEAL: Falling coolant level; check for system leaks

Symptoms

• The coolant level is below MIN or keeps falling. ^[1]

Possible causes

• The manual requires checking the cooling system for leaks when the level is low; it does not confirm failure of a specific assembly. ^[1]

Checks

• Wait until the motor, motor controller, radiator and reservoir have cooled completely before checking the level. Have a qualified technician check for leaks. ^[1]

What to do

• Handle coolant according to the specifications for the corresponding vehicle model and repair the cause of leakage. Do not open the cap while pressurised. ^[1]

Applicability and limits

• Only applies to the corresponding SEAL configuration in the New Zealand English owner's manual; the manual date is not treated as an applicable model year. No actual vehicle model has been linked. Do not extend to models with the same name, other powertrains or other markets. Scope: unknown ^[1]
• Only applies to the specific configuration in the cited manual; do not assume applicability to all vehicles with the same model name

Related part categories

• Fluids / Coolant / Cooling system ^[1]

Sources

[Source 1] BYD SEAL Owner’s Manual NZ 11/2023 — PDF pp.175–176 / printed pp.174–175, Cooling System (accessed 2026-11-01)
https://www.bydauto.co.nz/storage/uploads/584dac99-9035-4e65-9354-42c1b8162793/BYD-SEAL-OWNER%E2%80%98s-MANUAL-NZ_11_2023_web.pdf