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-   -   Trailer brakes/towing questions (https://xoutpost.com/bmw-sav-forums/x5-e70-forum/83422-trailer-brakes-towing-questions.html)

blue dragon 09-28-2011 10:42 AM

^^ I have to say I haven't had any braking issues backing down a ramp with surge brakes on the trailer, even with 6k lbs of boat and trailer behind me.

Here's a funny story->

I took my boat to get winterized yesterday, the mechanic sees the x5 towing the boat and says, thats an awfully small car to be towing that boat. :rofl: I tell him its 1) diesel and tows easily, 2) has the self levelling rear suspension 3) stops just fine. I took him for a short drive after the work was done, and he was sold. He couldn't believe it towed so easily.

F150 Duke 09-28-2011 11:48 PM

I have a 2012 X5 35i with the turbo inline 6 gas. I tow a 23' Sea Doo Challenger 230SE jet boat 30 min each way to the lake with highways, which means on/off ramps and inclines/declines.

The trailer is a two axle trailer that I believe is 26 feet in length with surge brakes. I've never had the slightest problem and I was extremely suprised the gas engine tows the boat so easily. It weighs roughly 5,500 lbs with gas and supplies. The engine never has to work hard and gets up to speed easily on the highway. The surge brakes work flawlessly and I never feel like the BMW has to work that much harder than normal.

Just use common sense and give yourself more room to brake and be safe. Don't be in a hurry. The X5 has built in trailer sway control that doesn't need to use the trailer's brakes to control sway. I had read somewhere that surge brakes are more popular on boat trailers as they are submerged often in water.

On a side note, I'm looking at the wireless electronic brake controller to be able to tow a 2 horse trailer that has electronic brakes.

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