On higher mileage vehicles, an engine misfire may develop and/or the Check Engine Light may illuminate due to a failed ignition coil. It is not uncommon to replace all the coils when the first one fails in order to prevent return trips to the repair shop.
Misfire and/or Check Engine Light Due to Failed Ignition Coil on Lexus RX300
Average mileage: 139,677 (60,000–216,000)
20 people reported this problem
10 people shared problem details
I had 3 coils fail within 9 months. At the point of the 3rd failure, I replaced all remaining coils. The front 3 are child's play to do yourself, a chimp with a screwdriver could do it. The rear 3, you'll wish you were a chimp due to the limited access. It can be done though, and without removing any other engine/intake parts. If this happens to you I recommend replacing all the coils, I never had a problem after that.
1999 Lexus RX300216,000Visitor
Coil 4, 5 went out within one week...Replaced all 6..
2002 Lexus RX300130,000Visitor
replace coils every 5 months went in this time said two coils out and one valve is shot. basically im junking it. valve job is like 4000 and then what next the engine, Forget it. 3.0 motor sucks.
2000 Lexus RX300154,250Visitor
Driving down the freeway and engine got loud (sounded like a putt-putt car), check engine light started flashing. Engine still had power so I kept driving. Shop found 3 cylinders were missing timing, replaced one bad ignition coil - cost $370.
2000 Lexus RX300Visitor
Check engine light came on and went off 3-4 times. Diagnostic check found coil pack needed to be replaced. No problem since coil pack was replaced.
1999 Lexus RX300113,000Visitor
Misfire and CEL came on and blinking. Coil was bad. Replaced with aftermarket. Month later another coil goes bad. First one was original Denso. Second was a replacement, Same brand I used on the first. Crap! Next one goes out I'm getting new OEM Denso brand from online and replacing all 6. Returning other brand under 1-year warranty.
1999 Lexus RX300177,000Visitor
1999 Lexus 300 Rx- Had the same problem with misfires. Very sporadic at first and was unsure exactly what the problem was. On my home from work one day in 100 degree weather vehicle could barely make it it was so herky jerky. Pulled over called tow truck ... Waited over an hour. Mechanic replaced all coils, tuneup and tow...$731.00!!!!!!! Next time I will take it in immediately!
2000 Lexus RX300181,000Visitor
Mid Firing Cylinder 1 and 2. Sluggish idling and check engine light on. Ignition coil replaced for 261.00.
1999 Lexus RX30060,000Visitor
Bought this 1999 Lexus 300 rx used with 30,000 miles on it. 2 ignition coils went out at 35,000 and now at 60,000 2 more have gone out. Not sure why we keep having to replace ignition coils every year but so far this hasn't been a good buy.
1999 Lexus RX30085,000Visitor
Car felt odd then the coil went out and couldn't even start the car. After getting it fixed, everything was right and felt normal.
how much does it cost to replace the ignition coils in the RX300
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