Shops quote $2,200–$2,300 for this one, and the quote usually isn't the ripoff, the job really is that big. Here's what's actually failing, what the correct repair involves, and the honest part: this is not a job I do in a driveway.
Honda's J35 V6 uses a rubber timing belt with a hard service interval, 105,000 miles (roughly 168,000 km) or seven years, whichever comes first. Plenty of 2007–2013 MDXs in the GTA are past that mark, sometimes on the original belt. The belt itself rarely gives dramatic warning: the rubber cracks between the teeth, the cords fatigue, and the years of Ontario freeze-thaw cycles age it faster than the odometer suggests.
The belt isn't the only thing hiding behind that timing cover. The water pump is driven by the belt, and on these engines it weeps from the shaft seal long before it fails outright, that's the coolant drip you see at the front of the engine. The cam and crank seals harden and start seeping oil onto the new belt area, and a tired hydraulic tensioner lets the belt flutter, which you sometimes hear as a tick on cold starts.
Here's what makes this urgent on a J35 specifically: it's an interference engine. If the belt strips or snaps, the pistons hit the open valves. That turns a maintenance job into bent valves, a cylinder head off the car, and in bad cases a replacement engine. Every part of this package lives behind the same cover, which is exactly why it gets done as one job, once the front of the engine is apart, replacing the pump, tensioner, idlers and seals costs only the parts.
If your Acura is doing any of these, this is the likely cause:
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See how that range compares across Mississauga, Oakville, Milton, Brampton and Etobicoke in the GTA Repair Price Index, honest shop & dealer ranges for the jobs people actually get done.
Timing Belt, Water Pump, Tensioner & Seals Replacement is on my published list of jobs I turn down. It needs a hoist, a press or a machine shop, and I work out of driveways with hand tools. That list is public on my trust page. I'd rather lose the job than learn it on your engine, and you should be suspicious of anyone who says yes to this over the phone.
So here's what I can genuinely do for you, holding a $2,200–$2,300 quote. Both are real, both are flat-priced, and both are worth more than a bad yes.
Before you spend $2,200–$2,300, have someone independent confirm that's actually what's wrong. This is a diagnosis, not the repair, no hoist, no lift, nothing comes apart. I scan it, test it, look at it with you, and tell you straight whether their diagnosis holds up. If it does, I say so and you go pay them with confidence.
Book the second opinion →At $2,200–$2,300 on a car that might be worth not much more, plenty of people replace instead of repair, that's a completely reasonable call. If that's where you're heading, get the next car measured before you hand over money: 150 published points, at the seller's location, written report the same day.
Book a pre-purchase inspection →Tell me what you've been quoted and what the car is doing. $100–$250 flat, at your location, and you get a straight answer either way.
Rather just have the quote read? The free quote check tells you whether the number is in line, no visit needed.
Jobs on this car that ARE mine:
Not so you can do it yourself, so you can tell whether the shop quoting you understands the job:
That's the job. It's why this one belongs on a hoist instead of in a driveway, and it's why $2,200–$2,300 usually isn't a ripoff, it's a big repair honestly priced. What's worth checking is whether that's really what your car needs.
Get the diagnosis confirmed firstPlain version: Timing Belt, Water Pump, Tensioner & Seals Replacement needs equipment a driveway doesn't have, a hoist to get under it properly, a press or a machine shop for the parts that come out, and a controlled space for an engine or gearbox that's in pieces for days. I work out of driveways with hand tools. That's not false modesty, it's the published limit of what I take on, and it's listed on my trust page alongside the warranty.
What that means for you: this page is here to tell you what's failing and what it should cost, so you walk into a shop knowing the job instead of nodding at a number. And if you want that number checked before you pay it, that part I can do, $100–$250 flat, at your location.
A timing belt doesn't fail gradually in a way you can drive around. When it lets go on an interference engine like the J35, the valves and pistons collide in the same revolution, there's no warning and no limping home. A weeping water pump also loses coolant slowly, and a hot-running V6 plus a low coolant level is how head gaskets die. Past the interval, every cold start is a roll of the dice.
You can, but you shouldn't. The pump sits behind the belt and is driven by it, the labour to reach it later is the same as the whole belt job again. On a 10+ year-old MDX the pump is already weeping or close to it. Doing it all at once is the only version of this job that makes financial sense.
Check service records for 'timing belt' around 160,000–170,000 km. No records and you're past that mileage, or past seven years on an older belt, assume it's original. We can also pop the upper cover and inspect the belt in person before quoting anything.
No. Timing Belt, Water Pump, Tensioner & Seals Replacement is on my published list of jobs I turn down, it needs a hoist, a press or a machine shop, and I work out of driveways with hand tools. I'd rather lose the job than learn it on your engine.
Two things, and both are real. A second-opinion diagnostic at your car, $100–$250 flat, at your location, so somebody independent confirms that's actually what's wrong before you commit to a $2,200–$2,300 repair. And if you're weighing replacing the car instead of fixing it, a pre-purchase inspection on the replacement, $149–$399 flat, at the seller's location.
Because the useful part isn't the wrench. It's knowing what's actually failing, what the correct repair involves, and that shops quote $2,200–$2,300 for it, so you walk in knowing the job instead of nodding at a number. If you want that number checked before you pay it, that part I can do.
Send it over for a free second opinion. I'll tell you straight what the job actually involves, and if their quote is fair, I'll tell you that too.
Get a Free Second OpinionOther makes:
I'm not the guy who does this repair. I'm the guy who tells you whether you actually need it, before you spend $2,200–$2,300. Second opinion at your car, $100–$250 flat, in Mississauga, Oakville, Milton, Brampton and Etobicoke.
Book a Second Opinion Inspect a Replacement CarYour options on this one