definitely annoying
Crashes / Fires:
0 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
33,580 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2003 Toyota Highlander engine problems

engine problem

Find something helpful? Spread the word.
Get notified about new defects, investigations, recalls & lawsuits for the 2003 Toyota Highlander:

Unsubscribe any time. We don't sell/share your email.

2003 Toyota Highlander Owner Comments

problem #2

Mar 312007

Highlander 4-cyl

  • Automatic transmission
  • 67,000 miles


1) noticed radiator fluid slowly leaking under bottom (towards back of engine). Had mechanic check engine, - was leaking at back of head gasket, took apart engine and noticed 3 back bolts to engine block (heads) could be removed by hand. When heads were fixed could not install new bolts (would not tighten) - mechanic said there is a manufacturer defect - no threads. 2) cannot fix engine - need new engine 3) trying to get Toyota to pay for repair - in progress with them now - no resolution yet.

- Denton, TX, USA

problem #1

Apr 012004

Highlander 6-cyl

  • Manual transmission
  • 160 miles
My 2003 Highlander limited 6-cyl. 4WD vehicle has a loud audible clicking noise (sounds like valve lifters ticking) eminating from the engine since I purchased the vehicle new from page Toyota in Jan '2003. The clicking noise is only present when the engine is running. The clicking noise is always audible but the volume decreases as the vehicle reaches normal operating temperature.the clicking noise is very loud when the vehicle is cold. The clicking noise frequency increases with increasing engine RPM and decreases with decreasing engine RPM. The Toyota red holman customer service representative stated that the clicking noise is normal and can not be reduced or eliminated.

- Novi, MI, USA

Not what you are looking for?