Mazda CX-5 KE2 — injector sealing and oil-strainer blockage
| English | 日本語 |
Scope
- Vehicles: Diesel CX-5 LDA-KE2FW/KE2AW, specifically item (1) of recall 3997. Do not assume all vehicles listed for its five issues need this particular repair.
- Engines/components: Injector mounting/sealing, engine-oil contamination, and oil strainer.
- Production window: The CX-5 campaign envelope is KE2FW 2012-02-13 to 2016-11-16 and KE2AW 2012-02-17 to 2016-11-16. The item (1) subset requires separate manufacturer confirmation.
- Markets: Japan. This entry does not extend the claim to gasoline CX-5s, KF-generation vehicles, or overseas campaigns.
The issue
Item (1) describes inadequate injector clamping that can allow combustion gas into the cylinder head. Carbonized oil can obstruct the strainer, reduce oil pressure, and lead to engine seizure. This is a specific published mechanism, not a diagnosis for every diesel warning light.
Symptoms an owner can detect
- A relevant warning lamp or reported low oil pressure requires professional assessment, not a generic DPF-cleaning recommendation.
- Do not run the engine to collect more demonstration footage if low oil pressure is suspected. Have the workshop decide transport and testing.
Severity
Critical. Loss of lubrication can destroy the engine or stop it while driving.
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: The published item (1) remedy includes correcting injector-nut tightening and checking oil pressure, with internal cleaning and strainer/oil replacement when the specified abnormality is found. Only qualified technicians should apply the exact factory procedure; no generic torque or DIY fuel-system steps are provided.
- Typical cost: Japan: confirm individual eligibility and the current remedy terms with the dealer first. No verified general retail price is supplied. Do not promise that all associated repairs are free; obtain an itemized quote for work outside the remedy.
Buyer checklist
- Ask for the result for item (1), rather than treating a software update for another item as proof of this work.
- Review oil-pressure assessment and repair records alongside the current symptoms and service history.
- Keep engine-health inspection separate from recall status; a completed campaign is not an engine-condition certificate.
Example prompt for an evidence-based check:
2014 Japan-market CX-5 KE2FW diesel: an invoice says recall 3997 software update completed. What evidence is still needed for injector sealing and oil-pressure item (1)?
Sources
- Mazda: recall 3997, especially item (1) and model-specific item counts, 2017-02-23
- Consumer Affairs Agency: recall 3997 notification and remedies
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.