AMPLIFIER UPDATE

[arlissd]

I just found out that there is a Technical Service Bulletin (TSB) for the installation of an updated amplifier for Lexus 2024-2025 vehicles, which covers NX, RX, TX, and GX. I don’t know the number but it is covered under a Lexus Service Campaign.

 

[killy]

TSB or recall?

Big difference. TSB you still have to establish a fault

 

[arlissd]

TSB or recall?

Big difference. TSB you still have to establish a fault

TSB.

 

[arlissd]

• A Special Service Campaign (25LC01, head unit notification) was released in mid‑April 2025, with Lexus planning owner notifications by late June 2025 .
• The campaign aims to address sound issues—like weak bass—by installing an updated amplifier/head unit. It’s not a safety fix, so it’s not labeled as a recall, but it’s a dealership-supported remedy .

 

[BryanM68]

Is this for the Mark Levinson unit only or does it apply to the standard system as well?

 

[arlissd]

it researched results for Mark Levinson.

 

[pajeeper]

Justin Horne ( FB Group ) has been lobbying Lexus and ML for a fix to the sounds issues in his TX. Given his persistence and the TX community's persistence, they have issued a TSB and it does seem to resolve the issues. To my knowledge, it only covers the TX. Seems we all need to report the issue to Lexus and just perhaps they will extend it to the GX. Attached is the TSB for the TX. If someone has evidence that the scope has been widened, please post the TSB number.

 

[RickBullotta]

I just found out that there is a Technical Service Bulletin (TSB) for the installation of an updated amplifier for Lexus 2024-2025 vehicles, which covers NX, RX, TX, and GX. I don’t know the number but it is covered under a Lexus Service Campaign.

Nope. That TSB is ONLY for the TX.