In May 2020, Mitsubishi filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Computer (Engine), covering the Aero Star. The filing affects 2,146 vehicles manufactured between May 29, 2013 and August 22, 2017.
Overview
| MLIT filing number | 1147430 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | May 14, 2020 |
| Manufacturer(s) | Mitsubishi |
| Component | Computer (Engine) |
| Production period | May 29, 2013 — August 22, 2017 |
| Vehicles affected | 2,146 units |
Filing in context
The Computer (Engine) is the most frequently cited component category in this archive, appearing in 49 of its 4,890 filings. This filing is one of 43 Mitsubishi notifications from 2020 in this archive. For scale, 2,370 of the 4,890 filings in this archive report a larger number of affected vehicles; the vehicles involved here were manufactured over a span of about 4 years and 2 months.
Defect
On large route buses, the engine ECU control program is improper, allowing peak combustion pressure to exceed the allowable limit for the connecting rod. Continued operation under these conditions causes cracks to develop in the connecting rod. In the worst case, the connecting rod may fracture, rendering the vehicle inoperable and causing a vehicle fire.
Corrective action
Because additional time is required to verify the necessity of inspecting and replacing the connecting rod, all vehicles will receive, as an interim measure, a reprogram of the engine ECU control program with corrected software. A permanent remedy will be implemented once finalized.
Affected models & chassis ranges
This filing lists 9 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 |
|---|---|---|
| QDG-MP35FM | ふそうエアロスター | MP35FM-63002 — MP35FM-63519 |
| QDG-MP35FP | ふそうエアロスター | MP35FP-63001 — MP35FP-63533 |
| QKG-MP35FK | ふそうエアロスター | MP35FK-63001 — MP35FK-66030 |
| QKG-MP35FM | ふそうエアロスター | MP35FM-63001 — MP35FM-66134 |
| QKG-MP35FP | ふそうエアロスター | MP35FP-63003 — MP35FP-66109 |
| QKG-MP37FK | ふそうエアロスター | MP37FK-63001 — MP37FK-63549 |
| QKG-MP37FM | ふそうエアロスター | MP37FM-63001 — MP37FM-63518 |
| QKG-MP38FK | ふそうエアロスター | MP38FK-64011 — MP38FK-66439 |
| QKG-MP38FM | ふそうエアロスター | MP38FM-64001 — MP38FM-66176 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
大型路線バスにおいて、エンジンＥＣＵの制御プログラムが不適切なため、最大燃焼圧力がコンロッドの許容限度を超える場合がある。そのため、そのままの状態で使用を続けると、コンロッドに亀裂が生じ、最悪の場合、コンロッドが破損して走行不能及び火災に至るおそれがある。
改善措置
コンロッドの点検及び交換の必要性について検証に時間を要するため、全車両、暫定措置として、エンジンＥＣＵの制御プログラムを対策品に書き換える。 なお、対策が決定次第、恒久対策を実施する。
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=3004747
Related recalls
Same manufacturer, same component
Other Mitsubishi filings involving the Computer (Engine), closest to this one by filing date.
Computer (Engine) — affects 140,682 vehicles.
Open recall detail →Computer (Engine) — affects 30,137 vehicles.
Open recall detail →Computer (Engine) — affects 23,179 vehicles.
Open recall detail →Computer (Engine) — affects 1,720 vehicles.
Open recall detail →Computer (Engine) — affects 1,720 vehicles.
Open recall detail →Other recalls affecting the same models
Filings whose affected type codes overlap with this one, newest first.
Rearview Mirror — affects 3,024 vehicles.
Open recall detail →Exhaust gas reduction device — affects 260 vehicles.
Open recall detail →Other — affects 26 vehicles.
Open recall detail →Wiring — affects 1,051 vehicles.
Open recall detail →Other (Control System) — affects 41,093 vehicles.
Open recall detail →All Mitsubishi recalls · All 2020 recalls · Recall Archive home