# Service bulletin BPaS03252021904

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10189922
- Published by NHTSA: 2021\-04\-06
- Manufacturer's number: BPaS03252021904
- Manufacturer's date: 2021\-03\-25
- NHTSA component: ENGINE AND ENGINE COOLING; EQUIPMENT; VISIBILITY

## NHTSA's summary

Dealer Message \- American Honda Motor Co., Inc. \(AHM\) is searching for certain 2019\-2020 MDXs with a client complaint of a blower motor noise. The noise can be described as a high pitch or a whistle noise. To better understand the cause of this condition, AHM would like to collect specific parts from the vehicle prior to you attempting a repair of any kind.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189922-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189922-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Equipment and accessories, Glass, wipers and mirrors

## Vehicles listed

- 2019 to 2020 ACURA MDX

## Recalls for the same vehicles and component

- [23V751000](/recalls/nhtsa/23V751000.md), 2023-11-13: ENGINE AND ENGINE COOLING:ENGINE:HARD PARTS INTERNAL/MECHANICAL
- [2023603](/recalls/tc/2023603.md), 2023-11-08: Engine
- [19V298000](/recalls/nhtsa/19V298000.md), 2019-04-12: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:BELTS AND ASSOCIATED PULLEYS
- [2019179](/recalls/tc/2019179.md), 2019-04-11: Engine

## Other bulletins for the same vehicles and component

- [BEBM12032025901](/bulletins/11026692.md), 2025-12-17, Other: ENGINE. Dealer Message \- Under certain circumstances, after coming to a stop and the idle stop feature engages, the vehicle may not automatically restart. Typically, the client can immediately restart the vehicle by selecting Park and pushing the ENGINE START/STOP button.
- [B25\-003](/bulletins/11023136.md), 2025-09-16, Service bulletin: VISIBILITY/WIPER. Service Bulletin \- An uneven sealing surface allows moisture to enter the inner taillight\(s\), causing one or both of the inner taillights not to work.
- [B25\-003](/bulletins/11020860.md), 2025-07-23, Service bulletin: VISIBILITY/WIPER. Service Bulletin \- An uneven sealing surface allows moisture to enter the inner taillight\(s\), causing one or both of the inner taillights not to work.
- [B23\-002](/bulletins/11020584.md), 2025-07-09, Service bulletin: ENGINE. Service Bulletin \- Under certain circumstances, after coming to a stop and engaging idle stop the vehicle may not restart automatically due to excessive cylinder pressure and/or low cranking torque. Typically, the client can immediately restart the vehicle by selecting Park and pressing the ENGINE START/STOP button.
- [B25\-003](/bulletins/11017330.md), 2025-04-29, Service bulletin: VISIBILITY/WIPER. Service Bulletin \- An uneven sealing surface allows moisture to enter the inner taillight\(s\), causing one or both of the inner taillights not to work.
- [B24\-022](/bulletins/11015014.md), 2025-03-05, Service bulletin: ENGINE. Service Bulletin \- The AWD warning light is on with one or more AWD DTCs having been set due to water intrusion into the electric oil pump motor connector area corrodes the terminals.
- [B23\-024](/bulletins/11002724.md), 2024-07-01, Service bulletin: VISIBILITY/WIPER. Service Bulletin \- Client complaint of A/C not blowing cold air due to oil/refrigerant leak from the A/C compressor shaft seal.
- [ONL6AX05292024](/bulletins/11000723.md), 2024-06-03, Other: ENGINE. Owner Notification Letter \- Under certain circumstances, after coming to a stop and the idle stop feature engaging, the vehicle may not automatically restart. Acura is providing a product update with a new PGM\-FI software update to fix this issue.
- [B24040A](/bulletins/11000147.md), 2024-05-15, Other: ENGINE. Service News \- Due to On\-Board Diagnostic \(OBD\) regulation change starting with 2019 vehicles, American Honda’s Variable Valve Timing and Lift Electronic Control \(VTEC\) On\-Board Diagnostic monitors are now included in the EGR/VVT OBD Monitor Readiness status group. Due to some customer’s driving patterns, they may not drive in the fashion needed to operate the VTEC \(EGR/VVT\) that only operates above 5,350 rpm to run the OBD monitoring. Therefore, the EGR/VVT OBD monitor group readiness status is not set to “Complete” when the customer presents their vehicle to a Smog Check station for inspection.
- [B23\-024](/bulletins/10249632.md), 2024-02-03, Service bulletin: VISIBILITY:DEFROSTER/DEFOGGER/HVAC SYSTEM; VISIBILITY. Service Bulletin \- Customers have complained that the air conditioning system is not blowing cold air due to Oil/Refrigerant leaking from the A/C compressor shaft seal.

JSON: [/v1/bulletins/10189922](/v1/bulletins/10189922)

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