XG1 & GG0 – Engine Damage from Connecting Rod Bearing Wear – 2016-2019 Honda & 2015-2020 Acura

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Next Unread Message View Message DATE: November 9, 2023 TO: All Honda Sales, Service & Parts Managers, and Personnel FROM: Brad Ortloff, Manager of Auto Campaigns and Recalls Re: Stop Sale/Safety Recall: 2016-19M Multi-Model Connecting Rod Bearing Inspection On November 8, 2023, American Honda notified NHTSA of a stop sale and safety recall for certain model year 2018-2019 Odyssey, 2016 & 2018-2019 Pilot, and 2017 & 2019 Ridgeline vehicles which may have engines containing internal damage at the connecting rod bearings possibly leading to engine failure. If an engine fails, the vehicle’s motive power may be lost, increasing the risk of crash, fire, or injury . Refer to your eResponsibility report or perform an iN VIN status inquiry to determine which units in your inventory are affected. Failure to repair a vehicle as necessary prior to sale or before returning the vehicle to a customer may subject your dealership to claims or lawsuits. BACKGROUND During the manufacturing process, some crankshafts may have been built with improper connecting rod journal specifications that could lead to early engine deterioration, damage, and possible failure due to lack of lubrication and excessive heat. REPAIR Inspect and if necessary, replace the bearings and/or the crankshaft and/or the short/long block. PARTS AND TOOLS Certain required parts and tools currently are estimated to be available in early spring 2024. We will notify you via iN message when they become available. SERVICE BULLETIN A stop sale only placeholder Service Bulletin 23-097, Safety Recall: 2016–19 Multi-Model Connecting Rod Bearing Stop Sale has posted to the Service Information System (SIS) as of November 9, 2023. A revised bulletin, including inspection, repair, parts, tools, and warranty claim information, will be posted to the SIS at a later date. CUSTOMER NOTIFICATION American Honda expects to complete customer notification in early January 2024. As always, perform an iN VIN status inquiry for all vehicles passing through your dealership to determine eligibility for any open campaigns. Sent on 11 09 2023 Expires on 01 01 2024 From Brad Ortloff, Manager of Auto Campaigns and Recalls Subject Stop Sale/Safety Recall: 2016-19M Multi-Model Connecting Rod Bearing Inspection INTERACTIVE NETWORK American Honda Motor Co., Inc. Page 1 of 1

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Next Unread Message View Message DATE: November 9, 2023 TO: All Acura Sales, Service & Parts Managers, and Personnel FROM: Brad Ortloff, Manager of Auto Campaigns and Recalls Re: Stop Sale/Safety Recall: 2015-20M Multi-Model Connecting Rod Bearing Inspection On November 8, 2023, Acura notified NHTSA of a stop sale and safety recall for certain model year 2016-2020 MDX and 2015-2020 TLX vehicles which may have engines containing internal damage at the connecting rod bearings possibly leading to engine failure. If an engine fails, the vehicle’s motive power may be lost, increasing the risk of crash, fire, or injury. Refer to your eResponsibility report or perform an iN VIN status inquiry to determine which units in your inventory are affected. Failure to repair a vehicle as necessary prior to sale or before returning the vehicle to a client may subject your dealership to claims or lawsuits. BACKGROUND During the manufacturing process, some crankshafts may have been built with improper connecting rod journal specifications that could lead to early engine deterioration, damage, and possible failure due to lack of lubrication and excessive heat. REPAIR Inspect and if necessary, replace the bearings and/or the crankshaft and/or the short/long block. PARTS AND TOOLS Certain required parts and tools currently are estimated to be available in early spring 2024. We will notify you via iN message when they become available. SERVICE BULLETIN A stop sale only placeholder Service Bulletin 23-036, Safety Recall: 2015–20 Multi-Model Connecting Rod Bearing Stop Sale has posted to the Service Information System (SIS) as of November 9, 2023. A revised bulletin, including inspection, repair, parts, tools, and warranty claim information, will be posted to the SIS at a later date. CLIENT NOTIFICATION Acura expects to complete client notification in early January 2024. As always, perform an iN VIN status inquiry for all vehicles passing through your dealership to determine eligibility for any open campaigns. Sent on 11 09 2023 Expires on 01 27 2024 From Brad Ortloff, Manager of Auto Campaigns and Recalls Subject Stop Sale/Safety Recall: 2015-20M Multi-Model Connecting Rod Bearing Inspection INTERACTIVE NETWORK American Honda Motor Co., Inc. Page 1 of 1

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-751 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Honda (American Honda Motor Co.) Submission Date : NOV 08, 2023 NHTSA Recall No. : 23V-751 Manufacturer Recall No. : XG1, GG0 Manufacturer Information : Manufacturer Name : Honda (American Honda Motor Co.) Address : 1919 Torrance Blvd. Torrance CA 90501 Company phone : 1-888-234-2138 Population : Number of potentially involved : 248,999 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2015-2020 Acura TLX Vehicle Type : LIGHT VEHICLES Body Style : 4-DOOR Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : FEB 05, 2014 – JUL 28, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2016-2020 Acura MDX Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 03, 2016 – MAR 20, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2016-2016 Honda Pilot Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : MAY 10, 2016 – JUN 03, 2016 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-751 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2018-2019 Honda Pilot Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 07, 2018 – JUN 19, 2019 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2018-2019 Honda Odyssey Vehicle Type : LIGHT VEHICLES Body Style : VAN Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : APR 09, 2018 – AUG 28, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 6 : 2017-2017 Honda Ridgeline Vehicle Type : LIGHT VEHICLES Body Style : PICKUP TRUCK Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : MAY 06, 2016 – MAY 16, 2016 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 7 : 2019-2019 Honda Ridgeline Vehicle Type : LIGHT VEHICLES Body Style : PICKUP TRUCK Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 09, 2018 – JUL 27, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Due to a manufacturing defect of the engine crankshaft, the connecting rod bearing can prematurely wear and seize. FMVSS 1 : NR Part 573 Safety Recall Report 23V-751 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 FMVSS 2 : NR Description of the Safety Risk : If the connecting rod bearing seizes, the engine can be damaged and run improperly, stall, stop while driving, and/or not start, increasing the risk of a fire, crash or injury. Description of the Cause : During production of the crankshaft, due to improper settings of equipment used to manufacture the engine crankshaft, the crank pin was improperly ground, resulting in crank pins with a crown or convex shape that are out of specification. Identification of Any Warning that can Occur : Abnormal engine noise, engine stalling, and/or decreased engine output with engine check lamp illumination. Involved Components : Component Name 1 : ENG SUB-ASSY Component Description : ENG SUB-ASSY Component Part Number : 10002-5J2-A00 Component Name 2 : ENG SUB-ASSY Component Description : ENG SUB-ASSY Component Part Number : 10002-5J6-A01 Supplier Identification : Component Manufacturer Name : NR Address : NR NR Country : NR Chronology : February 2020 Honda received the first market complaint for the issue. July 20, 2020 Honda began to investigate the issue. Part 573 Safety Recall Report 23V-751 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 November 2020 – February 2022 Honda continued to analyze and investigate the issue. April 2022 Honda began to conduct additional detail analysis to focus on different bearing specifications. February 2023 Honda began to investigate market vehicles that had not experienced the issue for detail comparison analysis. September 2023 Honda investigated the affected population of vehicles. November 2, 2023 Honda determined that a defect related to motor vehicle safety existed and decided to conduct a safety recall. As of November 3, 2023, Honda has 1,450 warranty claims, and no reports of injuries or deaths related to this issue from July 2014 through November 3, 2023 Description of Remedy : Description of Remedy Program : Registered owners of all affected vehicles will be contacted by mail and asked to take their vehicle to an authorized Honda or Acura dealer, as applicable. The dealer will inspect and, if necessary, repair or replace the engine. Owners who have paid to have these repairs completed at their own expense will be eligible for reimbursement, in accord with the recall reimbursement plan on file with NHTSA. How Remedy Component Differs from Recalled Component : The remedy components have properly ground crank pins and are within applicable specifications. Identify How/When Recall Condition was Corrected in Production : The manufacturing equipment setup and inspection processes were improved in 2020. Recall Schedule : Description of Recall Schedule : Dealer notification is scheduled to begin and end on or about 11/9/2023. Owner notification is scheduled to begin and end on or about 1/2/2024. Planned Dealer Notification Date : NOV 09, 2023 – NOV 09, 2023 Planned Owner Notification Date : JAN 02, 2024 – JAN 02, 2024 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-751 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Honda (American Honda Motor Co.) Submission Date : NOV 16, 2023 NHTSA Recall No. : 23V-751 Manufacturer Recall No. : XG1, GG0 Manufacturer Information : Manufacturer Name : Honda (American Honda Motor Co.) Address : 1919 Torrance Blvd. Torrance CA 90501 Company phone : 1-888-234-2138 Population : Number of potentially involved : 248,999 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2015-2020 Acura TLX Vehicle Type : LIGHT VEHICLES Body Style : 4-DOOR Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : FEB 05, 2014 – JUL 28, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2016-2020 Acura MDX Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 03, 2016 – MAR 20, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2016-2016 Honda Pilot Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : MAY 10, 2016 – JUN 03, 2016 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-751 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2018-2019 Honda Pilot Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 07, 2018 – JUN 19, 2019 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2018-2019 Honda Odyssey Vehicle Type : LIGHT VEHICLES Body Style : VAN Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : APR 09, 2018 – AUG 28, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 6 : 2017-2017 Honda Ridgeline Vehicle Type : LIGHT VEHICLES Body Style : PICKUP TRUCK Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : MAY 06, 2016 – MAY 16, 2016 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 7 : 2019-2019 Honda Ridgeline Vehicle Type : LIGHT VEHICLES Body Style : PICKUP TRUCK Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 09, 2018 – JUL 27, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Due to a manufacturing defect of the engine crankshaft, the connecting rod bearing can prematurely wear and seize. FMVSS 1 : NR Part 573 Safety Recall Report 23V-751 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 FMVSS 2 : NR Description of the Safety Risk : If the connecting rod bearing seizes, the engine can be damaged and run improperly, stall, stop while driving, and/or not start, increasing the risk of a fire, crash or injury. Description of the Cause : During production of the crankshaft, due to improper settings of equipment used to manufacture the engine crankshaft, the crank pin was improperly ground, resulting in crank pins with a crown or convex shape that are out of specification. Identification of Any Warning that can Occur : Abnormal engine noise, engine stalling, and/or decreased engine output with engine check lamp illumination. Involved Components : Component Name 1 : ENG SUB-ASSY Component Description : ENG SUB-ASSY Component Part Number : 10002-5J2-A00 Component Name 2 : ENG SUB-ASSY Component Description : ENG SUB-ASSY Component Part Number : 10002-5J6-A01 Supplier Identification : Component Manufacturer Name : American Honda Motor Co., Inc. Address : 1919 Torrance Blvd. Torrance California 90501 Country : United States Chronology : February 2020 Honda received the first market complaint for the issue. July 20, 2020 Honda began to investigate the issue. Part 573 Safety Recall Report 23V-751 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 November 2020 – February 2022 Honda continued to analyze and investigate the issue. April 2022 Honda began to conduct additional detail analysis to focus on different bearing specifications. February 2023 Honda began to investigate market vehicles that had not experienced the issue for detail comparison analysis. September 2023 Honda investigated the affected population of vehicles. November 2, 2023 Honda determined that a defect related to motor vehicle safety existed and decided to conduct a safety recall. As of November 3, 2023, Honda has 1,450 warranty claims, and no reports of injuries or deaths related to this issue from July 2014 through November 3, 2023 Description of Remedy : Description of Remedy Program : Registered owners of all affected vehicles will be contacted by mail and asked to take their vehicle to an authorized Honda or Acura dealer, as applicable. The dealer will inspect and, if necessary, repair or replace the engine. Owners who have paid to have these repairs completed at their own expense will be eligible for reimbursement, in accord with the recall reimbursement plan on file with NHTSA. How Remedy Component Differs from Recalled Component : The remedy components have properly ground crank pins and are within applicable specifications. Identify How/When Recall Condition was Corrected in Production : The manufacturing equipment setup and inspection processes were improved in 2020. Recall Schedule : Description of Recall Schedule : Dealer notification is scheduled to begin and end on or about 11/9/2023. Owner notification is scheduled to begin and end on or about 1/2/2024. Planned Dealer Notification Date : NOV 09, 2023 – NOV 09, 2023 Planned Owner Notification Date : JAN 02, 2024 – JAN 02, 2024 * NR – Not Reported

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OMB Control No.: 2127-0004 Part 573 Safety Recall Report 23V-751 The information contained in this report was submitted pursuant to 49 CFR §573 Manufacturer Name : Honda (American Honda Motor Co.) Submission Date : NOV 16, 2023 NHTSA Recall No. : 23V-751 Manufacturer Recall No. : XG1, GG0 Manufacturer Information : Manufacturer Name : Honda (American Honda Motor Co.) Address : 1919 Torrance Blvd. Torrance CA 90501 Company phone : 1-888-234-2138 Population : Number of potentially involved : 248,999 Estimated percentage with defect : 1 % Vehicle Information : Vehicle 1 : 2016-2020 Acura MDX Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 03, 2016 – MAR 20, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 2 : 2015-2020 Acura TLX Vehicle Type : LIGHT VEHICLES Body Style : 4-DOOR Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : FEB 05, 2014 – JUL 28, 2020 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 3 : 2016-2016 Honda Pilot Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : MAY 10, 2016 – JUN 03, 2016 VIN Range 1 : Begin : NR End : NR Not sequential Part 573 Safety Recall Report 23V-751 Page 2 The information contained in this report was submitted pursuant to 49 CFR §573 Vehicle 4 : 2019-2019 Honda Ridgeline Vehicle Type : LIGHT VEHICLES Body Style : PICKUP TRUCK Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 09, 2018 – JUL 27, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 5 : 2018-2019 Honda Odyssey Vehicle Type : LIGHT VEHICLES Body Style : VAN Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : APR 09, 2018 – AUG 28, 2018 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 6 : 2017-2017 Honda Ridgeline Vehicle Type : LIGHT VEHICLES Body Style : PICKUP TRUCK Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : MAY 06, 2016 – MAY 16, 2016 VIN Range 1 : Begin : NR End : NR Not sequential Vehicle 7 : 2018-2019 Honda Pilot Vehicle Type : LIGHT VEHICLES Body Style : SUV Power Train : GAS Descriptive Information : The recall population was determined based on manufacturing records. The production range reflects all possible vehicles that could experience the problem. Production Dates : JUN 07, 2018 – JUN 19, 2019 VIN Range 1 : Begin : NR End : NR Not sequential Description of Defect : Description of the Defect : Due to a manufacturing defect of the engine crankshaft, the connecting rod bearing can prematurely wear and seize. FMVSS 1 : NR Part 573 Safety Recall Report 23V-751 Page 3 The information contained in this report was submitted pursuant to 49 CFR §573 FMVSS 2 : NR Description of the Safety Risk : If the connecting rod bearing seizes, the engine can be damaged and run improperly, stall, stop while driving, and/or not start, increasing the risk of a fire, crash or injury. Description of the Cause : During production of the crankshaft, due to improper settings of equipment used to manufacture the engine crankshaft, the crank pin was improperly ground, resulting in crank pins with a crown or convex shape that are out of specification. Identification of Any Warning that can Occur : Abnormal engine noise, engine stalling, and/or decreased engine output with engine check lamp illumination. Involved Components : Component Name 1 : ENG SUB-ASSY Component Description : ENG SUB-ASSY Component Part Number : 10002-5J2-A00 Component Name 2 : ENG SUB-ASSY Component Description : ENG SUB-ASSY Component Part Number : 10002-5J6-A01 Supplier Identification : Component Manufacturer Name : American Honda Motor Co., Inc. Address : 1919 Torrance Blvd. Torrance California 90501 Country : United States Chronology : February 2020 Honda received the first market complaint for the issue. July 20, 2020 Honda began to investigate the issue. Part 573 Safety Recall Report 23V-751 Page 4 The information contained in this report was submitted pursuant to 49 CFR §573 November 2020 – February 2022 Honda continued to analyze and investigate the issue. April 2022 Honda began to conduct additional detail analysis to focus on different bearing specifications. February 2023 Honda began to investigate market vehicles that had not experienced the issue for detail comparison analysis. September 2023 Honda investigated the affected population of vehicles. November 2, 2023 Honda determined that a defect related to motor vehicle safety existed and decided to conduct a safety recall. As of November 3, 2023, Honda has 1,450 warranty claims, and no reports of injuries or deaths related to this issue from July 2014 through November 3, 2023 Description of Remedy : Description of Remedy Program : Registered owners of all affected vehicles will be contacted by mail and asked to take their vehicle to an authorized Honda or Acura dealer, as applicable. The dealer will inspect and, if necessary, repair or replace the engine. Owners who have paid to have these repairs completed at their own expense will be eligible for reimbursement, in accord with the recall reimbursement plan on file with NHTSA. How Remedy Component Differs from Recalled Component : The remedy components have properly ground crank pins and are within applicable specifications. No crankshafts were produced for engines in 2017 Pilot and 2018 Ridgeline vehicles and, as such, are not included in the recall population. Identify How/When Recall Condition was Corrected in Production : The manufacturing equipment setup and inspection processes were improved in 2020. Recall Schedule : Description of Recall Schedule : Dealer notification is scheduled to begin and end on or about 11/9/2023. Owner notification is scheduled to begin and end on or about 1/2/2024. Planned Dealer Notification Date : NOV 09, 2023 – NOV 09, 2023 Planned Owner Notification Date : JAN 02, 2024 – JAN 02, 2024 Part 573 Safety Recall Report 23V-751 Page 5 The information contained in this report was submitted pursuant to 49 CFR §573 * NR – Not Reported

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