Sealion 06 Roof and Cabin Water-Entry Checks

Build a timeline before dismantling anything

Ask when the moisture was first noticed, whether it followed rain, washing, air-conditioning use or storage, and which areas were affected. Photograph visible staining and record odour, condensation and recurrence. A seller may already have cleaned the cabin, so request earlier photographs or invoices where available. Use the flood and structural guide when the history suggests wider exposure. Avoid concluding that every damp patch has the same origin. A precise timeline helps a workshop choose a controlled investigation instead of replacing parts without evidence.

Identify the installed roof and previous work

Confirm the roof equipment fitted to the selected vehicle and ask about glass, seal, body or trim repairs. Do not assume every Sealion 06 version has identical roof hardware or drainage arrangements. Inspect visible fit, staining and disturbed trim without removing components casually. A panoramic-looking panel does not tell you which parts open or which service procedures apply. If replacement glass is involved, the glass-repair guide helps organise the documentation questions. Keep windscreen work, roof work and collision repairs separate in the record so the source of a later symptom can be traced.

Trace water through controlled workshop methods

Have a competent workshop select the appropriate test for the suspected path. Water can travel behind trim before becoming visible, so the wettest point is not necessarily the entry point. Avoid high-pressure spraying, forcing objects into drainage paths or applying sealant at random. Those actions can create damage or conceal the original defect. Request a description of the test conditions, observed path and proposed repair. A claim that drains were cleaned is incomplete if no cause was identified and no subsequent check was performed under conditions relevant to the original complaint.

Separate condensation and climate-system symptoms

Recurring window misting or a damp smell may need a climate-system assessment as well as a body-sealing check. Note whether the issue changes with passenger load, weather, settings or air-conditioning operation. The air-conditioning guide covers the wider operating context. Do not assume a refrigerant refill addresses water entry, or that a dry dashboard means the carpet underlay is dry. Describe observations rather than diagnosing them from a remote photograph. A workshop should determine whether several symptoms share one cause or require separate investigations.

Escalate electrical and contamination concerns

If moisture is associated with electrical warnings, corrosion evidence or suspected significant immersion, stop treating the issue as a cosmetic cleaning job. Arrange an appropriately qualified assessment, including high-voltage precautions where relevant. Do not energise, probe or dismantle affected equipment to see whether it still works. The inspection scope should state which systems were assessed and which remain uncertain. Drying visible surfaces does not demonstrate that concealed components are sound. Likewise, a clean diagnostic screen after codes were cleared does not reconstruct the vehicle's exposure history.

Agree a repair scope and proof of completion

A useful proposal identifies the suspected cause, parts or materials, access work, drying requirements and follow-up test. Ask which affected components need inspection or replacement rather than accepting an odour treatment as the entire remedy. Record before-and-after evidence and the conditions of the retest. Put unresolved issues into the purchase evaluation, including possible downtime. If the car is due for shipment, allow enough time for verification before dispatch. A rushed repair just before loading may leave the destination buyer unable to distinguish an old leak from transport-related moisture.

Recheck after arrival and normal use

Compare cabin condition at destination with the dispatch record and note any new marks before cleaning. Observe the vehicle through ordinary weather and climate-system use without deliberately exposing it to damaging conditions. Retain the workshop report so a recurrence can be investigated consistently. Include unresolved symptoms in the first service brief. A successful controlled retest supports the repair conclusion, but no single dry inspection can guarantee that an intermittent problem will never recur. The buyer should receive an honest evidence trail and a clear route for follow-up.

Buyer checklist

• Record timing, location and recurrence before cleaning.
• Confirm fitted roof equipment and repair history.
• Use controlled workshop tests rather than improvised probing.
• Escalate electrical or immersion concerns appropriately.

Questions and answers

Reference information

Use the applicable market and year documentation for equipment and operating limits. The references have their own market and publication scope; they do not establish the condition, fitted equipment or destination approval of an individual vehicle.

• BYD China Sealion 06 EV model reference
• BYD China Sealion 06 DM-i model reference