2023 Mack MD problems and owner complaints
Explore the records behind recurring owner reports.
Key facts
1 owner complaints analyzed
2 distinct recall campaigns
Not available median reported failure mileage
Scope: 2023 model year. Data updated: . 0 complaints include usable failure mileage. View data status.
This selection has limited data. It remains available for lookup but is excluded from search indexing.
Most common problems
Engine is the most frequently named component, appearing in 1 of 1 complaints (100.0%). A complaint can name multiple components.
| Topic | Matching reports | Share of complaints |
|---|---|---|
| Transmission and shifting | 1 | 100.0% |
| Electrical and battery issues | 1 | 100.0% |
Topic matches use published keyword rules. They describe mentions, including negations or comparisons, and do not confirm a diagnosis. Read the matching rules.
Component breakdown
Number of unique complaints naming each component. Top eight shown.
| Category | Count |
|---|---|
| Engine | 1 |
| Fuel/Propulsion System | 1 |
| Power Train | 1 |
Engine: 1; Fuel/Propulsion System: 1; Power Train: 1
Reported problems by failure mileage
Complaint counts in mileage bands. These are not failure rates per vehicle or mile.
| Category | Count |
|---|---|
| Under 25,000 | 0 |
| 25,000 to 49,999 | 0 |
| 50,000 to 74,999 | 0 |
| 75,000 to 99,999 | 0 |
| 100,000 to 149,999 | 0 |
| 150,000 and above | 0 |
Under 25,000: 0; 25,000 to 49,999: 0; 50,000 to 74,999: 0; 75,000 to 99,999: 0; 100,000 to 149,999: 0; 150,000 and above: 0
No usable failure mileage is recorded. 1 complaints have missing, zero or invalid mileage.
Complaints over time
Year the complaint was filed, not the vehicle model year or incident year. The snapshot year is partial.
| Category | Count |
|---|---|
| 2026 | 1 |
2026: 1
Pattern summary
Engine leads the component reports. Transmission and shifting appears in 1 complaint narratives. Electrical and battery issues appears in 1 complaint narratives. Use these patterns to inspect individual reports and prepare questions for a mechanic.
Calculated from recorded counts. An AI narrative has not been published for this selection.
Complaint evidence
Examples provide context, not a representative sample or a verified diagnosis.
Owner report 11744905 · 2026-06-17 (June 17, 2026)
COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF…
Owner-reported narrative. Look up ODI 11744905 at NHTSA ↗
Vehicle analysis explorer
Inspect model-year patterns, reported mileage, monthly activity and the evidence behind each signal.
Data completeness
1 unique complaints in this selection. Analysis snapshot: 2026-09-30.
Missing, zero and invalid mileage is excluded. Dates after the snapshot are excluded. Examples are limited selections, not a representative sample.
Problems by model year
Model-wide comparison of the eight most reported components across the model. Cells show counts and shares within each model year. Open a cell for source examples.
| Component | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|
| Power Train | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 1100.0%ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… | 0UnavailableNo examples available for this selection. | 1100.0%ODI 11625816[XXX] - the truck lost brakes for the first time. The truck was returned 3/15/24 3/20/24 - The truck went back in the shop to get parts installed that were ordered. The truck was picked up 4/15/24. 4/16/24 - The truck went back in to the dealer for break noise and issues. The truck was picked up on 4/19/24. 4/22/24 - The truck went back to the dealer for break failure and issues. The truck was picked up 5/4/24 7/5/24 - The truck went back in the shop for break issues. The truck was picked up on 7/15/24 8/20/24 - the truck lost breaks - … | 0UnavailableNo examples available for this selection. |
| Engine | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 1100.0%ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Fuel/Propulsion System | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 1100.0%ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. |
| Service Brakes | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 0UnavailableNo examples available for this selection. | 00.0%No examples available for this selection. | 0UnavailableNo examples available for this selection. | 1100.0%ODI 11625816[XXX] - the truck lost brakes for the first time. The truck was returned 3/15/24 3/20/24 - The truck went back in the shop to get parts installed that were ordered. The truck was picked up 4/15/24. 4/16/24 - The truck went back in to the dealer for break noise and issues. The truck was picked up on 4/19/24. 4/22/24 - The truck went back to the dealer for break failure and issues. The truck was picked up 5/4/24 7/5/24 - The truck went back in the shop for break issues. The truck was picked up on 7/15/24 8/20/24 - the truck lost breaks - … | 0UnavailableNo examples available for this selection. |
Darker cells indicate a larger share of submitted complaints. Components overlap. This measures complaint composition, not failure probability.
Failure mileage by component
Median and middle 50% of usable owner-reported mileages. Ranges require at least five records.
| Component | Mileage range (25th–75th percentile) | Median | Usable records | Examples |
|---|---|---|---|---|
| No usable records for this analysis. | ||||
Complaint and recall timeline
Explore monthly filing activity alongside recall announcements. Up to ten years of monthly history is available.
Solid line: filed complaints. Dashed amber lines: recall announcement dates for this vehicle selection; markers include all recall components. The latest month is partial. Temporal proximity does not establish causation.
Monthly counts, recall campaigns and complaint examples
| Month | Complaints | Campaigns announced | Examples |
|---|---|---|---|
| 2024-10 | 0 | None | No examples available for this selection. |
| 2024-11 | 0 | None | No examples available for this selection. |
| 2024-12 | 0 | None | No examples available for this selection. |
| 2025-01 | 0 | None | No examples available for this selection. |
| 2025-02 | 0 | None | No examples available for this selection. |
| 2025-03 | 0 | None | No examples available for this selection. |
| 2025-04 | 0 | None | No examples available for this selection. |
| 2025-05 | 0 | None | No examples available for this selection. |
| 2025-06 | 0 | None | No examples available for this selection. |
| 2025-07 | 0 | None | No examples available for this selection. |
| 2025-08 | 0 | None | No examples available for this selection. |
| 2025-09 | 0 | None | No examples available for this selection. |
| 2025-10 | 0 | 25V666000 | No examples available for this selection. |
| 2025-11 | 0 | None | No examples available for this selection. |
| 2025-12 | 0 | None | No examples available for this selection. |
| 2026-01 | 0 | None | No examples available for this selection. |
| 2026-02 | 0 | None | No examples available for this selection. |
| 2026-03 | 0 | None | No examples available for this selection. |
| 2026-04 | 0 | None | No examples available for this selection. |
| 2026-05 | 0 | None | No examples available for this selection. |
| 2026-06 | 1 | None | ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… |
| 2026-07 | 0 | None | No examples available for this selection. |
| 2026-08 | 0 | None | No examples available for this selection. |
| 2026-09 (partial) | 0 | None | No examples available for this selection. |
Emerging complaint spikes
Complete months in the latest six months with at least 10 complaints, at least twice the preceding 12-month average, and at least three square-root deviations above that average.
This is a descriptive screening rule, not a statistical defect finding. Publicity and reporting changes can increase submissions.
No complete months meet the spike thresholds for this selection.
Equal-age model-year comparison
Model-wide cumulative reports during the first three or five calendar years, starting with the model year (age 0). Only fully elapsed windows are compared.
2022: 0 complaints · 2023: 1 complaints
| Model year | Through age 0 | Through age 1 | Through age 2 |
|---|---|---|---|
| 2022 | 0 | 0 | 0 |
| 2023 | 0 | 0 | 1 |
Date coverage across each selected cohort
| Year | Incident dates used | Filing date fallbacks | Excluded dates |
|---|---|---|---|
| 2022 | 0 | 0 | 0 |
| 2023 | 1 | 0 | 0 |
Incident date is preferred when valid and no later than filing; otherwise filing date is used. Model year approximates age. Equal observation time does not adjust for sales, distance driven or reporting delays. One complaint linked to multiple model years can appear in each cohort.
Components reported together
Each cell counts unique complaints naming both components. Open a nonzero cell for examples.
| Component | Engine | Fuel/Propulsion System | Power Train |
|---|---|---|---|
| Engine | — | 1ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… | 1ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… |
| Fuel/Propulsion System | 1ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… | — | 1ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… |
| Power Train | 1ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… | 1ODI 11744905COMPONENTS THAT FAILED: Multiple systems failed in a connected chain. (1) The DPF aftertreatment differential pressure sensor , a CONFIRMED manufacturing defect per Cummins recall T7186/T7187 (Jan 2026). (2) The Allison automatic transmission , catastrophic internal failure: torque converter destroyed, flexplate warped and cracked, metal fragments throughout. (3) The transmission control unit wiring (circuits 143/123) reversed at the factory. The DEF sensor in the same aftertreatment system also failed back in Dec 2023, 14 months before the DPF… | — |
Co-reporting does not establish that one component caused another concern.
Recurring narrative patterns
Specific keyword mentions beyond broad component labels. Matching includes negations and comparisons and does not confirm a diagnosis.
0 patterns with matching reports.
No narratives match the published patterns.