Overview
| MLIT filing number | 1141722 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | February 1, 2018 |
| Manufacturer(s) | Mazda |
| Component | Engine |
| Production period | August 2014 — October 30, 2017 |
| Vehicles affected | 158,785 units |
Defect
In the diesel engine, repeated low-speed acceleration and deceleration increases soot generated during combustion, which accumulates in the injector nozzle bores and degrades the fuel spray pattern. This causes soot production to increase further, allowing deposits to build up around the exhaust-side valve guides. As a result, the exhaust valves become difficult to move, causing poor acceleration and vehicle vibration due to reduced compression, and the engine warning light or glow lamp indicator illuminates. In the worst case, the engine may stall.
Corrective action
Owners are notified of the defect and instructed to bring the vehicle in for inspection promptly if the engine warning light illuminates or the glow lamp indicator flashes. Upon inspection, the engine control computer and related components are inspected, the exhaust valve springs and injectors are replaced at no charge, and soot accumulated in the engine and DPF (diesel particulate filter) is cleaned.
Affected models & chassis ranges
This filing lists 6 type code(s). A vehicle is affected if its chassis number falls within one of the ranges below.
| Type code (型式) | Model | Chassis ranges |
|---|---|---|
| LDA-BMLFP | AXELA | BMLFP-100002 — BMLFP-100356 |
| LDA-BMLFS | AXELA | BMLFS-100011 — BMLFS-111454 |
| LDA-DJ5AS | DEMIO | DJ5AS-100009 — DJ5AS-302568 |
| LDA-DJ5FS | DEMIO | DJ5FS-100032 — DJ5FS-312015 |
| LDA-DK5AW | ＣＸ－３ | DK5AW-100027 — DK5AW-203764 |
| LDA-DK5FW | ＣＸ－３ | DK5FW-100053 — DK5FW-208913 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
ディーゼルエンジンにおいて、低車速で加減速する走行を繰り返すと、燃焼時に発生する煤の量が増え、インジェクタ噴孔部に堆積し、燃料の噴霧状態が悪化することで、さらに煤の量が増え、排気側バルブガイド周辺に堆積することがある。そのため、排気バルブが動きにくくなり、圧縮低下による加速不良や車体振動が発生するとともに、エンジン警告灯が点灯あるいはグローランプが点滅し、最悪の場合、エンジンが停止するおそれがある。
改善措置
使用者に当該不具合を周知し、エンジン警告灯が点灯あるいはグローランプが点滅した場合は、速やかに点検入庫するよう促す。また、点検入庫した場合には、エンジン制御コンピュータ等を点検し、排気バルブのバルブスプリング、インジェクタを無償で交換するとともに、エンジンおよびＤＰＦ（黒煙除去フィルタ）に堆積した煤を清掃する。
Source & verification
This entry reproduces public data from Japan's MLIT recall registry. English text is jdmvin.com's own translation; always verify against the official source:
https://renrakuda.mlit.go.jp/renrakuda/ris-detail-car.html?class=recalldatacar&id=3004166