Suzuki Wagon R MH23S — evaporator refrigerant leak
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Scope
- Vehicles: Wagon R MH23S rows in the 2015-12-18 warranty-extension notice. Palette and Alto Lapin have separate rows in that notice.
- Engines/components: Air-conditioning evaporator.
- Production window: Discontinuous listed MH23S ranges within 2008-09-03 to 2012-08-20; verify the actual chassis row.
- Markets: Japan; a warranty extension, not a recall or an unlimited free-repair offer.
The issue
Suzuki describes corrosion-related refrigerant leakage and poor cooling. The historical extension was nine years from first registration. Do not infer present coverage from the model name or from a previous refrigerant refill.
Symptoms an owner can detect
- Poor air-conditioning cooling; a refill history can be useful evidence but does not identify the leak location.
- Have an A/C specialist distinguish evaporator leakage from other leaks, compressor operation, or airflow problems.
Severity
Major. Repair can involve substantial labor; the notice does not establish a fixed retail price.
Frequency (honest assessment)
The cited manufacturer information does not establish a failure probability for this vehicle or a mileage-based failure rate. A campaign population is not a count of failed vehicles; do not describe every example as defective.
Fix and cost
- Repair: After confirming the leak, have a qualified workshop replace the affected evaporator under the applicable service procedure. Refrigerant recovery and charging require appropriate equipment; repeated topping-up is not proof that the leak has been repaired.
- Typical cost: Japan: warranty eligibility depends on the first-registration date, the specified failure, and dealer confirmation. No verified current retail range is provided here; request an itemized quote for diagnosis, parts, labor, refrigerant recovery, and charging.
Buyer checklist
- Ask for leak-diagnosis and replacement records, not just a gas-refill receipt.
- Record first registration separately from production date when checking the historical nine-year condition.
- Obtain an out-of-warranty quote before treating a cooling complaint as a minor recharge job.
Example prompt for an evidence-based check:
2011 Japan-market Wagon R MH23S: the air conditioner was refilled twice, but the leak location is unknown. Prepare questions for an A/C shop without promising warranty coverage.
Sources
Sources checked: 2026-10-30. Recheck notices and schedules when using this entry. The buyer checklist is this project’s verification workflow, not a reproduction of a factory inspection procedure.