Originally Posted by Ruthe
It is a 2005...
We came across the 2005 Highlander which has a good price and only 39 thousand miles, but they didn't mention a tow package in the ad...
I suspect that a lot of people would not mention the towing prep package in an ad even if they had it, as they might not be aware of the package.
I assume this vehicle has a V6 engine, as few people would deliberately choose the less-common 4-cylinder if they had towing in mind.
2005 is in the first generation of Highlanders, which use the "MZ" series of V6 engines; these do not have an engine oil cooler in the towing prep package, so it would be just the components which gbaglo listed at the start. In 2005, they specifically had the 3.3 L 3MZ-FE engine, identical to the 2004-2006 Sienna (such as mine). It is very difficult to visually spot the towing package components, since every Highlander will have a transmission cooler integrated into the radiator (the package gives you a larger cooler in a higher-capacity radiator). That VIN check with Toyota seems like a good idea.
Toyota provides lots of towing information in the owners manual (at least they did in 2004/2005, and at least for the Sienna), so that's a good reference source. Fortunately, they offer these manuals (a section at a time) for free download from Toyota owners
; you do need to register, but it is free and does not require that you already have a Toyota. Trailer towing information is in Section 3 - "Starting and Driving". It looks like the same content as my Sienna manual (most is generic stuff independent of model, and the Sienna and Highlander have the same drivetrain and so the same rated capacity), and it confirms the ratings others have quoted.