Dimming Lights and Weak Battery Issues on 2014 Lexus IS: Seeking Advice and Mechanic Experiences

Hey there! I own a 2017 Lexus GS and I experienced pretty much the same symptoms you mentioned a while back. Just like you, I noticed my lights dimming irregularly and the battery feeling weak during startup. So, I took it to the garage and after the mechanic did a thorough check, he found that the battery sensor microprocessor was indeed defective. It might sound a little technical, but what it essentially does is monitor and control how your battery operates, as well as how it's being charged. This is a pretty serious issue in my opinion. Without this working correctly, you could get incorrect readings about your battery's condition or even risk damaging the battery or other electrical components. In my case, they had to replace that microprocessor to deal with the issue. It was a bit of a hassle but it's crucial for the smooth functioning of the vehicle. But don't worry too much yet, just take it to a trusted mechanic and cross verify. Cheers!

Hey, cheers for the quick response! It sounds like you've been through exactly my current situation. The microprocessor issue sounds like a bit of a headache, but as you pointed out, better nip that in the before it does more damage. Just out of curiosity, can you recall around how much you spent on getting that sorted out? Also, has anything else cropped up since you had it fixed? I'm hoping to avoid more surprises further down the line. Thanks again for all your help!

Hey! Yeah, you’re spot on! It was definitely a bit of a headache, but I'm thankful I got it sorted out sooner rather than later to avoid more issues down the line. For getting that battery sensor microprocessor fixed, I had to part with around 315 Euro. A bit steep, I know, but definitely worth it! And yes, since the old boy's been to the garage, the vehicle battery sensor error has been a thing of the past, no more dimming lights or weak startup. Touch wood, nothing else has cropped up since then, she's been running smoothly like a dream. Remember cars are a bit like humans. Sometimes we've got to splurge a bit for their well being, eh? Cheers!

That's comforting to know! So, it's about a 315-euro job. It's a bit hefty but peace of mind is worth it. With your experience in mind, I'll head to the garage as soon as I can to get this rectified. Your logic makes sense! Just as we need to look after our health, our cars deserve the same level of care. Here's to hoping my experience with the mechanic is as painless as yours turned out to be. Thanks a ton for your advice and insight. Really appreciate it! Cheers to smooth rides and no more flickering lights!