In June 2013, Lexus & Toyota filed a statutory recall with Japan's Ministry of Land, Infrastructure, Transport and Tourism (MLIT) concerning the Service brake — general, covering the Prius, HS250h. The filing affects 116,994 vehicles manufactured between March 23, 2009 and October 16, 2009.
Overview
| MLIT filing number | 1131630 |
|---|---|
| Type | Statutory Recall (government-mandated recall) |
| Date filed | June 5, 2013 |
| Manufacturer(s) | Lexus, Toyota |
| Component | Service brake — general |
| Production period | March 23, 2009 — October 16, 2009 |
| Vehicles affected | 116,994 units |
Filing in context
This notification is a joint filing by 2 manufacturers: Lexus & Toyota.
The Service brake — general is the most frequently cited component category in this archive, appearing in 16 of its 4,890 filings. This filing is one of 3 Lexus notifications from 2013 in this archive. For scale, 407 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 6 months.
Defect
The accumulator in the electronic brake system was designed with insufficient consideration of structural strength. Vertical vibration during driving can impose excessive stress on a portion of the accumulator vessel. Over time, fatigue cracks develop in the vessel, allowing nitrogen gas to gradually infiltrate the brake fluid inside. This increases brake pedal travel and reduces braking force.
Corrective action
On all vehicles, inspect the accumulator. On affected units, replace the brake booster pump assembly with a unit incorporating the corrected accumulator.
Affected models & chassis ranges
This filing lists 2 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 |
|---|---|---|
| DAA-ANF10 | ＨＳ２５０ｈ | ANF10-2000102 — ANF10-2009185 |
| DAA-ZVW30 | PRIUS | ZVW30-1000000 — ZVW30-1092030; ZVW30-5000004 — ZVW30-5076072; ZVW30-0052877 — ZVW30-0067874 |
Original Japanese (MLIT source text)
Show the original Japanese filing text
状況
電子制御ブレーキシステムにおいて、アキュムレータ（蓄圧器）の強度検討が不足していたため、走行時の上下振動により、蓄圧容器の一部に大きな力が加わることがある。そのため、使用過程で当該容器に疲労亀裂が入り、容器内のブレーキフルードに窒素ガスが徐々に浸入してブレーキペダルの踏み代が増加し、制動力が低下するおそれがある。
改善措置
全車両、アキュームレータを確認し、該当するものは対策品のアキュームレータが組み込まれたブレーキブースタポンプと交換する。
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=3003045
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Open recall detail →All Lexus recalls · All Toyota recalls · All 2013 recalls · Recall Archive home