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Service bulletins for the 2015 Acura TLX

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.

430 on file from NHTSA, as of 2026-10-19.

By type

By component

By trouble code

Only bulletins with component: Transmission and driveline are shown. Show all

Bulletins, newest first
BTS-151101 V22021-05-14. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE (TCM/PCM/TECM). Replacement TCMs don’t come with trim data. After installation, you need to run a teach-in (hydraulic pressure characteristic calibration) procedure with the HDS. The problem is that A/T DTC P287C (transmission adaptive values not learned) is set, which prevents teach-in. This happens because the TCM is programmed to look for trim data any time the ignition is cycled. If the TCM doesn’t see that trim data, it sets A/T DTC P287C. If any DTCs are set, the TCM won’t initiate teach-in and, as a result, can’t learn the trim data. It’s a classic catch-22 situation.
SB-16-0122021-05-13. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION. BACKGROUND American Honda has made several shift quality improvements in the 2015 and 2016 TLX V6. SYMPTOM There is a sensation of acceleration while coasting down a hill. There is a sensation of a surge while braking. The transmission feels like it stays in gear too long. CORRECTIVE ACTION Update the TCM software. Clear all DTC’s created during the update and do the idle learn procedure. This software update will change the way the transmission shifts. After the update it may take up to 30 miles for the transmission to adapt to the client’s driving habits.
B19-0032020-12-09. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Service Bulletin - During a downshift from 9th or 8th gear to 7th gear or lower, a miscalculation in the TCM software causes the MIL to come on with DTC P0716 (input shaft [mainshaft] speed sensor [range/performance]).
B20-0152020-11-03. Service bulletin. POWER TRAIN; EQUIPMENT ADAPTIVE/MOBILITY; EQUIPMENT. Service Bulletin - The transmission has intermittent harsh or jerky upshifts with steady acceleration.
B19-0032020-10-21. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM. Service Bulletin - During a downshift from 9th or 8th gear to 7th gear or lower, a miscalculation in the TCM software causes the MIL to come on with DTC P0716 (input shaft [mainshaft] speed sensor [range/performance]).
B15-0402020-09-16. Service bulletin. POWER TRAIN. Service Bulletin - Under very specific driving conditions the customer may notice the 2-3 upshift is more pronounced (firmer) than the other shifts. The transmission is working properly and this does not indicate a problem. This is not a durability concern.
B20-0152020-09-04. Service bulletin. POWER TRAIN; EQUIPMENT. Service Bulletin - The transmission has intermittent harsh or jerky upshifts with steady acceleration.
B19-0032019-09-18. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Service Bulletin - During a downshift from 9th or 8th gear to 7th gear or lower, a miscalculation in the TCM software causes the MIL to come on with DTC P0716 (input shaft [mainshaft] speed sensor [range/performance]).
B19-0032019-07-23. Service bulletin. POWER TRAIN. Service Bulletin - During a downshift from 9th or 8th gear to 7th gear or lower, a miscalculation in the TCM software causes the MIL to come on with DTC P0716, input shaft [mainshaft] speed sensor [range/performance].
B19-0032019-06-19. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Service Bulletin - During a downshift from 9th or 8th gear to 7th gear or lower, a miscalculation in the TCM software causes the MIL to come on with DTC P0716, input shaft [mainshaft] speed sensor [range/performance].
ONLKG5030820192019-03-15. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. Owner Notification Letter - Our records indicate that a PRODUCT UPDATE has not been completed on this vehicle, refer to the address card for the affected VIN. Your TLX previously had the transmission replaced because of a leaking 9-speed automatic transmission fluid (ATF) warmer. As the issue was under investigation when the transmission was replaced, your vehicle needs further action before it is completely repaired.
ONLKG2030820192019-03-15. Service bulletin. POWER TRAIN; POWER TRAIN:AUTOMATIC TRANSMISSION. Owner Notification Letter - Our records indicate that a PRODUCT UPDATE has not been completed on this vehicle, refer to the address card for the affected VIN. The automatic transmission fluid (ATF) warmer was improperly manufactured and may allow the engine coolant and ATF to mix. If the coolant and ATF mix, the engine and transmission may be damaged and require replacement.
B15-0392018-10-15. Service bulletin. POWER TRAIN. Service bulletin - The transmission end cover leaks on vehicles with 9-speed A/T. During assembly, the transmission end cover sealing gasket gets torn.
B18-0142018-05-07. Service bulletin. SEATS; POWER TRAIN. Service bulletin - When adjusting seat height or tilt, the power seat does not move or moves just a small amount and clicks loudly during operation. The vertical transmission assembly (VTA) unit has a stripped internal gear.
B17-0272018-04-23. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Service bulletin - American Honda is extending the warranty on the 9-speed transmission warmers to 10 years from the original date of purchase with unlimited mileage. This warranty covers vehicles where the engine coolant and ATF mix because of an internal leak in the 9-speed transmission warmer.
B17-0122018-04-23. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Service bulletin - Some 9-speed transmission warmers were improperly manufactured and allow the engine coolant and ATF to mix. If the fluids mix, the engine and transmission may be permanently damaged and require replacement. These vehicles previously had the transmission replaced because the transmission warmers leaked. In rare cases, these vehicles may have also overheated but because the issue was under investigation, a standard repair procedure hadn?t been developed. Further action is needed before the vehicle is completely repaired.
B17-0112018-04-23. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Service bulletin - Some 9-speed transmission warmers were improperly manufactured and allow the engine coolant and ATF to mix. If the fluids mix, the engine and transmission may be permanently damaged and require replacement.
B17-0272018-03-13. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Service bulletin - American Honda is extending the warranty on the 9-speed transmission warmers to 10 years from the original date of purchase with unlimited mileage. This warranty covers vehicles where the engine coolant and ATF mix because of an internal leak in the 9-speed transmission warmer.
B17-0122018-03-13. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Service bulletin - Some 9-speed transmission warmers were improperly manufactured and allow the engine coolant and ATF to mix. If the fluids mix, the engine and transmission may be permanently damaged and require replacement. These vehicles previously had the transmission replaced because the transmission warmers leaked. In rare cases, these vehicles may have also overheated but because the issue was under investigation, a standard repair procedure hadn?t been developed. Further action is needed before the vehicle is completely repaired.
B17-0112018-03-13. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING. Service bulletin - Some 9-speed transmission warmers were improperly manufactured and allow the engine coolant and ATF to mix. If the fluids mix, the engine and transmission may be permanently damaged and require replacement.
Customer Letter2018-02-05. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Customer letter - On some 2015?16 TLX vehicles, the automatic transmission fluid (ATF) warmer was improperly manufactured and may allow the engine coolant and ATF to mix. If the coolant and ATF mix, the engine and transmission may be damaged and require replacement.
B17-0272018-01-29. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Service bulletin - American Honda is extending the warranty on the 9-speed transmission warmers to 10 years from the original date of purchase with unlimited mileage. This warranty covers vehicles where the engine coolant and ATF mix because of an internal leak in the 9-speed transmission warmer.
B17-0122018-01-29. Service bulletin. POWER TRAIN; ENGINE AND ENGINE COOLING. Service bulletin - Some 9-speed transmission warmers were improperly manufactured and allow the engine coolant and ATF to mix. If the fluids mix, the engine and transmission may be permanently damaged and require replacement. These vehicles previously had the transmission replaced because the transmission warmers leaked. In rare cases, these vehicles may have also overheated but because the issue was under investigation, a standard repair procedure hadn?t been developed. Further action is needed before the vehicle is completely repaired.
B17-0112018-01-29. Service bulletin. ENGINE AND ENGINE COOLING; POWER TRAIN. Service bulletin - Some 9-speed transmission warmers were improperly manufactured and allow the engine coolant and ATF to mix. If the fluids mix, the engine and transmission may be permanently damaged and require replacement.
Customer Letter2017-12-05. Service bulletin. POWER TRAIN:AUTOMATIC TRANSMISSION; ENGINE AND ENGINE COOLING. Customer letter - On a limited number of 2015?16 TLX vehicles, the automatic transmission fluid (ATF) warmer was improperly manufactured and may allow the engine coolant and ATF to mix. If the coolant and ATF mix, the engine and transmission may be damaged and require replacement. If the ATF warmer allows coolant and ATF to mix, you may notice one or more of the following symptoms: ? The vehicle overheats ? The transmission shifts poorly ? The transmission chirps during 3-4 shift

The summaries are NHTSA's. Each bulletin's page links NHTSA's copy of the manufacturer's document.