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I would like to know if the Prestone Power Steering Fluid + Stop Leak compatible with my '07 Toyota Camry LE's (4 cyl) power steering fluid specifications since i don't see any mention of its use aside from saying its claim "Developed for use in GM, Ford, Chrysler, and most foreign cars and light trucks." Any feedback is appreciated. Thank you!

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In this pdf document put out by Toyota, it states:

Power steering fluid type: Automatic transmission fluid DEXRON II or III

Seeing as how DEXRON II and DEXRON III are used by GM in their vehicles (over the years ... now it's the newer versions), the Prestone product you are looking at should be just fine in there and should cause your vehicle no issues.

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Many vehicles will accept automatic transmission fluid in the power steering, but it is not worth detracting from the vehicle manufacturers recommendation. If you do use an alternative fluid without a recommendation for its use, you run the very real chance of destroying the internal rubbers/seals in the system. If you have an oil leak on your system then you should have it repaired, and use the correct fluid. A loss of power-assisted steering whilst driving could end up in a catastrophic accident.

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    As it says in the product description, this product can be used for preventive maintenance. If this is the OP's intention, how does your answer goes anywhere towards answering the question? – Pᴀᴜʟsᴛᴇʀ2 Oct 8 '14 at 21:29
  • Do you think that the fluids are made, specified and recommended for no good reason? The wrong fluid will destroy the rubbers/seals. – Allan Osborne Oct 9 '14 at 18:35
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    This does not answer the question as the asker never asked about transmission fluid or 'alternative' fluids, but about Prestone Power Steering Fluid. – Eric Deloak Dec 18 '15 at 17:49
  • Have you even driven a car with malfunctioning power steering? Unlike power brakes, power steering is not important. At high speed, the force required to turn the steering wheel is minimal with or without power steering. The problem is that steering force while at standstill is huge without power steering, but that doesn't cause an accident. Obviously, steering is probably even more safety-critical than brakes, so if the failure is such that it could cause the car to suddenly turn left to right, driving is unsafe. But most failures only lead to loss of power assisted steering. – juhist Feb 11 '17 at 13:08
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Although this doesn't directly answer the question, it should be mentioned that usually there is no such thing as a mechanic in a can (or bottle). If your power steering leaks, most likely you need to replace the leaking part. Your car is so recent that replacement parts are probably made. Prepare to spend about $1000 if it's the steering rack that failed.

Of course, because replacing the steering rack is so expensive, I do understand why people use these stop leak fluids. It may or may not work. For me, I had two steering rack leaks on my 1989 Opel Vectra, neither of which was fixed by the stop leak. Replacement parts were not being made, so the second steering rack was from the junkyard, and was as old as the first that started to leak, explaining why the second one started to leak as well.

Your car is so new that it shouldn't leak (the leakage is probably the reason why you need more fluid in the system). So, you had an uncommon early failure.

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