Skip the auto shop - Our mechanics make house calls

Q: Should I replace the timing belt?

asked by on

i just purchased a 2003 toyota 4runner(4x4) with 139000 miles, i cant tell if the timing belt needs to be replaced or not, is it better to be safe than sorry..?

My car has 139000 miles.
My car has an automatic transmission.

Your engines timing belt is recommended to be replaced every 90,000 miles. If you cannot find proof that the timing belt was replaced at 90,000 miles then I would recommend timing belt be replaced. This engine is an interference motor and this means that if the timing belt breaks the engine may bent the valves inside the engine causing major engine damage. This is why I would recommend having the timing belt inspected and replaced.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car smokes constantly

A smoking engine can be caused by many situations. Leaking internal seals can cause blue smoke. A badly leaking head gasket causing an engine to try to burn coolant can send off white smoke or steam. If you need assistance,...

Q: Gear shift lever not working

Hi there. You can be experiencing 1 of 2 things. Your vehicle's brake switch which indicates that the brake is pressed allowing you to shift gears may be malfunctioning. These typically deteriorate overtime causing the shifter to be "stuck." Secondly...

Q: Coolant leaking from exhaust manifold area (behind the engine)

Hi there. Before we condemn the head gasket or cylinder block, we need to consider that the coolant may be coming from another location. This could be a hose, throttle body, thermostat, water pump, heater hoses, or freeze plugs. A...

Related articles

How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.