Skip the auto shop - Our mechanics make house calls

Q: ECU Compatibility

asked by on

My RAV4 contains a damaged ECU with the reference 89661-42D70 , but I didn't find another one with the same reference, some sites specialist in toyota parts like toyodiy.com says that I can use another one compatible with my car with different reference 89661-42D40 ( the difference is in the last two chiffres ) , can I do that ?

My car has 280000 miles.
My car has an automatic transmission.

A: The part number for the 3.5L 6-cylinder eng...

The part number for the 3.5L 6-cylinder engine is 8966142G02 and the number for the 4-cylinder engine is 8966142F72. As long as the ECU you're getting matches or cross references the appropriate part number, there shouldn't be a problem. However, you can't simply plug the new ECU in and go. It must be programmed with an OEM capable scan tool in order to operate properly. A professional, with the proper equipment can both install the proper ECU and program it for you. It might also be a good idea to get the vehicle diagnosed by an expert to confirm the ECU is the problem.

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・Save up to 30%

Get a quote

What others are asking

Q: How do I use the automatic air conditioning system?

If your car is equipped with an automatic air conditioning system (optional equipment), you can set the temperature that you want for the interior of the cabin and let the computer handle all the details. You can also set a...

Q: how did you fix power steerting fluid leaking problem, how much it will cost.?

Leaks occur in these systems either in the low (return) or high pressure hoses, the power steering pump seal and/or the rack and pinion assembly. The actual source of the leaks is identified during a leak diagnostic at the conclusion...

Q: Rear brake clicking noise after putting on a set of shoes and drums.

Hi there. Check the hardware to the shoes and see if the springs are sprung. A loose brake return spring will cause a clicking sound as its touching the drum when the brakes are applied. If the springs are the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
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.