I've had my 2013 DCLB 4x4 TRD Sport for about 4 months & 7,500 miles & so far I love it except for the engine pinging. The pinging typically happens between 1k-1.5k rpms, in 5th gear, between 40 & 45 mph while the engine is under load. However, the noise has been inconsistent at times, by which it usually happens 3 or more times in my 20 mile drive home from work, but I can't always make the engine knock when I want to.
I've taken vehicle to dealer several times over the matter. The first time they couldn't duplicate the noise, the second time they were able to verify that the engine was pinging & did not know how to remedy the problem so the technician opened a case with Toyota Technical Assistance. Toyota Technical Assistance responded to the matter claiming that it is normal for the vehicle to ping. Not being satisfied with that answer, I opened a complaint/case with Toyota Corporate about the matter. The Corporate representative, was very cooperative at first, saying that a regional factory service representative would be on site at the dealership to check out my vehicle. Then the conversation changed after he spoke to a factory service representative. Corporate is now stating that engine pinging/knocking is normal. He pointed me to look in the Owner's manual, on page 467, which states:
If your engine knocks
Consult your Toyota dealer.
You may occasionally notice light knocking for a short time while
accelerating or driving uphill. This is normal and there is no need for
Sorry for the wall of text, but I am just extremely disappointed/frustrated that Toyota states that it is normal for their vehicle to ping/knock. Especially when I have spent $30k+ on the vehicle. I know that I could put 89 or 93 octane gas and that should alleviate the problem, but if the vehicle is designed to take 87, why should I spend the extra money on higher test gas. Not really sure how to proceed, or what my options are from here.