New Toyota Position On Reinforcements
Toyota issued a revised position on the repair of high-strength steel (HSS) and ultra-high-strength steel (UHSS) occupant cabin reinforcements. In this Collision Repair Information Bulletin (CRIB) 175, it is stated:
- Do not straighten HSS or UHSS occupant cabin reinforcements, hot or cold
- Do not section pillar reinforcements 980 Megapascals (MPa) and 590 MPa
- Only section 440 MPa parts where specified in the Toyota service information
Occupant cabin reinforcements include not only pillar, rocker panel, and roof rail reinforcements, but roof bows, floor crossmembers, door beams, and the rear bulkhead as well. Any of these parts that are HSS or stronger cannot be repaired.
In the CRIB, Toyota states, "This recommendation is based on a reduction in reinforcement strength and crash energy management revealed during research and testing conducted by Toyota Motor Corporation. Repaired and/or improperly sectioned reinforcements failed to exhibit the strength and performance ratings of genuine new original equipment service parts installed to specification. Therefore, damaged occupant cabin reinforcements must be replaced."
In a recent interview with I-CAR, James Meyer, Senior Technical Training Administrator for Toyota Motor Sales stated Toyota's position on limited repair of occupant cabin reinforcements.
To identify the strength ratings of steel, particularly in newer models, refer to the model-specific Toyota Repair Manual for Collision Damage structural outline, listed in the Introduction section. This section identifies structural materials and strengths.
Some applications of 440 MPa steel (HSS) include the bottom third of many B-pillars on Toyota, Lexus, and Scion vehicles. 590 MPa steel (UHSS) is common in the upper two-thirds of the B-pillar reinforcements and rocker panel reinforcements. 980 MPa steel (UHSS) is also used on some rocker panel reinforcements.
This article first appeared in the July 5, 2010 edition of the I-CAR Advantage Online.
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