What's the reason for Lexus' reduced braking force and failure to start?

2 Answers
OEloise
07/29/25 4:43am
Lexus' reduced braking force and failure to start can be attributed to the following reasons: 1. Dead battery: Sometimes when you wake up in the morning and find that the car cannot start normally, it is likely because the trunk was not completely closed, causing the trunk light to stay on and drain the battery. 2. Spark plug failure: Spark plugs themselves are prone to damage, and short circuits in high-voltage lines can prevent the spark plugs from igniting. Additionally, poor-quality spark plugs can also lead to startup failure. 3. Starting circuit malfunction: If there is only a slight 'click' sound when starting and no further response, this is caused by a stuck starting relay. In this case, simply pressing the tail of the electromagnet to force it forward can connect the starting circuit, thereby allowing the engine to start.
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WalterDella
08/12/25 8:24am
Well, I've been driving a Lexus RX for several years and have encountered this kind of situation where the braking force decreases along with the engine not starting. It happened last month, I remember the brake pedal felt spongy and lacked power when pressed, and I tried several times but couldn't start the engine. After checking the brake fluid, I found it was almost dry, possibly due to a leak in the pipeline or an aging oil pump. As for the starting issue, it was probably the battery giving out or the starter motor getting stuck. These high-end cars have a lot of electronic systems, and sometimes false alarms from the ABS sensor can also drag down the braking force. Safety first, so I immediately called for a tow truck. At the dealership, they checked it out and replaced the brake components and the battery—spending a little to avoid big risks. My advice is not to force-start the car; instead, use a multimeter to check the battery voltage. If it's below 12V, replace it. Then, check the brake pads and fluid level. Don't try to save money by doing it yourself; leave it to professional technicians for peace of mind.
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