Spark plugs



I have a 2006 Toyota Highlander Hybrid with about 130,000. miles. The dealership is telling me that I should replace the spark plugs. The cost will be over $600.00. Does this sound about right?


No way. estimate is $175 to $230 for new spark plugs. Are you sure the dealership estimate was only for new plugs? If so, someone has a boat payment to make…


At that mileage the plugs definitely need replacing. The dealer price seems very high, unless they replace the wires and a number of other things as well.

I would get a second estimate from an independent shop.


It’s an 8 year old 'Yota. Spark plugs are a common maintenance item any shop can handle. I’d get a second opinion from an independent shop, but insist on Denso plugs. They are the OEM supplier, and work best in your truck.


Denso or NGK are both OEM suppliers to Toyota. Either is fine.

$600 is outrageous. It may have to be put on a lift to get to the back plugs, but it shouldn’t cost anywhere near $600 - even if they use iridium plugs.


Is it possible that the dealer is recommending the 120,000 mile service–including spark plug maintenance AND some other items?


We don’t have your owner’s manual handy. Please tell us when it says the plugs should be replaced.


I found this - here. It doesn’t look like it would cost $600.00. Note: Unless I missed it, it’s the first mention of changing spark plugs…

2006 Highlander Hybrid 120,000 Miles - 144 Months

Replace engine oil and oil filter

Rotate tires

Replace cabin air filter

Replace engine air filter

Replace spark plugs

Re-torque drive shaft bolt (4WD)

Inspect the following:

__ Automatic transmission fluid
__ Ball joints and dust covers
__ Brake lines and hoses
__ Brake linings/drums and brake pads/discs

__ Differential oil
__ Drive belts
__ Drive shaft boots
__ Engine and inverter coolant

__ Engine valve clearance

__ Exhaust pipes and mountings
__ Fuel lines and connections, fuel tank band and fuel tank vapor vent system hoses
__ Fuel tank cap gasket
__ Radiator, condenser and intercooler
__ Steering gear box
__ Steering linkage and boots


A dealership shop could easily parlay that list into a $600 work-order…