Investigations
ABS CORROSION EXTENDS STOPPING DIST
NHTSA Engineering Analysis EA02036 - closed, opened 2002-12-11 and involving the FREIGHTLINER FREIGHTLINER.
NHTSA investigation EA02036 is a Engineering Analysis opened on 2002-12-11 and currently closed. The subject of record is FREIGHTLINER FREIGHTLINER, which places this file inside the Office of Defects Investigation queue for FREIGHTLINER. Latest activity on this investigation was logged on 2004-01-26 - NHTSA updates that field whenever an Information Request goes out, a supplement is filed, or a status change is recorded in the public docket.
An Engineering Analysis like EA02036 is the deeper technical phase that follows a PE. NHTSA requests design, warranty, and field-failure data from the manufacturer, conducts its own testing when needed, and determines whether the evidence supports a safety defect finding that would compel a recall.
Investigators summarized the matter as follows: "THE TONE RING TOOTH PROFILE OF AN UNCOATED HYDRAULIC DISC BRAKE DEGRADES AFTER EXPOSURE TO CORROSIVE ENVIRONMENTS. WHEN THE TONE RING TOOTH PROFILE HAS DEGRADED IN FREIGHTLINER VEHICLES, THE ABS WARNING LIGHT ILLUMINATES..." Investigations are the early-warning layer of the federal auto-safety system, sitting upstream of formal recalls and defect orders. Whether this one closes without action or escalates into an Engineering Analysis, the full history stays in the ODI archive so researchers, litigators, and buyers can pull the paper trail at any time. Related FREIGHTLINER files, listed below, give context on whether this is an isolated concern or part of a broader pattern across the brand.
Investigation Summary
THE TONE RING TOOTH PROFILE OF AN UNCOATED HYDRAULIC DISC BRAKE DEGRADES AFTER EXPOSURE TO CORROSIVE ENVIRONMENTS. WHEN THE TONE RING TOOTH PROFILE HAS DEGRADED IN FREIGHTLINER VEHICLES, THE ABS WARNING LIGHT ILLUMINATES RELIABLY TO WARN THE OPERATOR TO HAVE THE ABS SYSTEM SERVICED. IN RESPONSE TO ODI'S INQUIRY, FREIGHTLINER HAS ISSUED INFORMATION TO ALL AFFECTED OWNERS THAT ALERTS OWNERS TO THE IMPORTANCE OF RESPONDING TO THE ILLUMINATED ABS WARNING LIGHT. FREIGHTLINER ADOPTED COATED ROTORS DURING 2002 (DATE VARIES BY MODEL). SINCE NEITHER ODI NOR FREIGHTLINER HAVE ACCURATE DATA TO FORECAST THE CORROSION RESISTANCE OF COATED ROTORS, ODI PLANS TO CONDUCT A FUTURE SURVEY AT FREIGHTLINER (IN 18-24 MONTHS) TO EVALUATE THE DURABILITY OF THE COATED ROTORS.
About This Investigation Type
An Engineering Analysis (EA) is the in-depth phase following a Preliminary Evaluation. NHTSA engineers conduct testing, collect data from manufacturers, and perform detailed technical analysis to determine whether a safety defect exists. An EA may lead to a voluntary recall by the manufacturer or, in rare cases, a mandatory recall order.
Other FREIGHTLINER Investigations
EVDM connector plate separation
Halogen Headlights May Cause Fires
Trolley bus circuit breaker fires
Rear Wheel Speed Sensor Failure
Intermittent Loss of Power Steering Assist
Data from NHTSA Office of Defects Investigation. Cross-references: NHTSA recall campaign API and NHTSA FARS where fatality records overlap. PlainCars does not rate or recommend vehicles. about how PlainCars sources NHTSA data.
Read our methodology - how this data is sourced, computed, and verified.