Engine coolant change interval?

TT3 iN NyC · 05-05-2012, 01:49 PM

Hi guys,

I was curious as to what the coolant interval change is for these cars?

I have a 07 e92 335, with about 26,xxx miles. Bought in Feb of 2008. Coolant hasn't been changed yet.

Should I do an engine coolant flush/fill?

RoundelM3 · 05-05-2012, 03:04 PM

No. BMW considers coolant as "lifetime fill", no real need to change it unless it becomes contaminated. Brake fluid, yes. Transmission/rear axle - depends on your preference, although I changed mine at about 35K miles.

turboawdfanatic · 05-05-2012, 05:09 PM

Last time I brought my car in for an oil change they recommended a power steering flush and coolant system flush. Mines an 08 with 41.5k

TT3 iN NyC · 05-05-2012, 05:45 PM

Hmm thanks. So even the coolant is lifetime?

Outlaw 06 · 05-05-2012, 05:48 PM

BMW's recommended coolant change interval used to be every two years. Since 2004 BMW claims the engine coolant is a "lifetime fill". I sort of compromise by changing the "lifetime fill" engine coolant every three years or 30,000 miles. There's no scientific reason for that interval, I just chose it because it sounds more reasonable to me than never changing it (until your water pump, thermostat, etc. needs replacement). I use a 50/50 mix of BMW antifreeze and distilled water. IMO, it's not worth risking corroding the engine's aluminum block and head to save a few dollars by using cheap antifreeze and tap water.

cvc 22349a · 05-05-2012, 05:48 PM

Did a drain and fill at 40k per my indie

TT3 iN NyC · 05-05-2012, 06:22 PM

I'm definitely going to use BMW OEM coolant. Do I mix it with water or no?

bimmertt · 05-05-2012, 08:16 PM

Yes, you have to mix it with distilled water. Just changed mine a couple weeks ago. Same year/mileage as you.

fl335i · 08-18-2012, 08:40 PM

Resurrecting this post. my '07 with 45k miles is showing high Electrolysis levels today. Checking it from the coolant resv to the ground jump lug. .3-.4v.

05-05-2012, 01:49 PM	#1
TT3 iN NyC Colonel 247 Rep 2,567 Posts Drives: F80 M3CS Join Date: Aug 2007 Location: nYc iTrader: (9)	Engine coolant change interval? Hi guys, I was curious as to what the coolant interval change is for these cars? I have a 07 e92 335, with about 26,xxx miles. Bought in Feb of 2008. Coolant hasn't been changed yet. Should I do an engine coolant flush/fill? __________________ 07 e92 335i - Retired 18 F80 M3CS - Retired 21 G20 330i M-Sport - Current
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05-05-2012, 03:04 PM	#2
RoundelM3 Major General 1837 Rep 6,990 Posts Drives: 15 F80 M3, 22 G01 X3 30i Join Date: Apr 2010 Location: Clayton, NC iTrader: (2) Garage List 2022 BMW X3 [9.83] 2015 BMW M3 [6.50]	No. BMW considers coolant as "lifetime fill", no real need to change it unless it becomes contaminated. Brake fluid, yes. Transmission/rear axle - depends on your preference, although I changed mine at about 35K miles. __________________ 2015 F80 ///M3 Sedan 7DCT Tanzanite, 2022 X3 sDrive30i 8AT Brooklyn Grey
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05-05-2012, 05:09 PM	#3
turboawdfanatic Lieutenant 50 Rep 554 Posts Drives: 3 Join Date: Nov 2007 Location: US iTrader: (5)	Last time I brought my car in for an oil change they recommended a power steering flush and coolant system flush. Mines an 08 with 41.5k
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05-05-2012, 05:45 PM	#4
TT3 iN NyC Colonel 247 Rep 2,567 Posts Drives: F80 M3CS Join Date: Aug 2007 Location: nYc iTrader: (9)	Hmm thanks. So even the coolant is lifetime? __________________ 07 e92 335i - Retired 18 F80 M3CS - Retired 21 G20 330i M-Sport - Current
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05-05-2012, 05:48 PM	#5
Outlaw 06 Major 212 Rep 1,071 Posts Drives: M240i (daily driver) Join Date: Jun 2009 Location: CT iTrader: (0)	BMW's recommended coolant change interval used to be every two years. Since 2004 BMW claims the engine coolant is a "lifetime fill". I sort of compromise by changing the "lifetime fill" engine coolant every three years or 30,000 miles. There's no scientific reason for that interval, I just chose it because it sounds more reasonable to me than never changing it (until your water pump, thermostat, etc. needs replacement). I use a 50/50 mix of BMW antifreeze and distilled water. IMO, it's not worth risking corroding the engine's aluminum block and head to save a few dollars by using cheap antifreeze and tap water. __________________
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05-05-2012, 05:48 PM	#6
cvc 22349a Colonel 164 Rep 2,556 Posts Drives: 335i Join Date: Sep 2007 Location: SF Bay iTrader: (11)	Did a drain and fill at 40k per my indie __________________ 2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, Koni/M3 susp, Apex Arc 8, Mich PSS
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05-05-2012, 06:22 PM	#7
TT3 iN NyC Colonel 247 Rep 2,567 Posts Drives: F80 M3CS Join Date: Aug 2007 Location: nYc iTrader: (9)	I'm definitely going to use BMW OEM coolant. Do I mix it with water or no? __________________ 07 e92 335i - Retired 18 F80 M3CS - Retired 21 G20 330i M-Sport - Current
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05-05-2012, 08:16 PM	#8
bimmertt Lieutenant Colonel 93 Rep 1,794 Posts Drives: 2007 e92 335i Join Date: Nov 2008 Location: Earth iTrader: (7)	Yes, you have to mix it with distilled water. Just changed mine a couple weeks ago. Same year/mileage as you.
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08-18-2012, 08:40 PM	#9
fl335i Captain 146 Rep 942 Posts Drives: 335i Join Date: Oct 2010 Location: FL iTrader: (2)	Resurrecting this post. my '07 with 45k miles is showing high Electrolysis levels today. Checking it from the coolant resv to the ground jump lug. .3-.4v. __________________ '07 335i Sedan, base pkg, 6spd Manual, Procede 3 V5 w/NLS, Macht Schnell Downpipes, 18" Staggered 313's w/Conti DWS's, OS Giken TCD LSD, VAC Street Diff Cover, Dinan Oil Cooler, Dinan Intercooler, Akebono Euro Pads, CDV Removed, Black BMW Grilles, Interior & Exterior white LED lighting, LUX Angel Eyes, Debadged, Blend V1 mount, Llumar ATR Tint.
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