so i just baught a 87 325i and im pretty sure it has a 325e motor in it first question is was a easy forsure way of figuring that out...and the main problem is that the tach doesn't work and the mpg guage doesn't work and the speedo works when it wants or when i smack the dash board. if anyone has any ideas how to fix this let me know. thanks
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You might need to bye a new SI board or git new batteries for it.
What are your inspection indicator lights at?sigpicComment
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I would also say SI board batteries.
As far as the speedo goes, could be as simple as a loose plug on the back of the cluster. Or it's just bad.Comment
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ok so what kind of batteries does the SI board take?Comment
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I have this same problem on my 88 ix, and the red and yellow oil service lights stay on all the time, whether the car is off or on.
Also, not to get off track but my coolant light on the overhead stays on whenever the car is on, but I am not overheating and I have a good coolant level. Any ideas on this?WTB late model, anywhere on the east coast will go as far west as Texas for the right car at the right price. 5 speed 6cyl only.
"She may not look like much, but she's got it where it counts, kid." - Han SoloComment
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Problem one: si board/batteriesOriginally posted by jeffesaurusrex View Post
Problem two: replace your coolant level sensor
To the op: pull your gauge cluster and take it apart, clean all the contacts of the boards and the gauges (all the pins and the sockets they go into). Then when you reinstall, make sure the two grounding nuts on the back of the cluster are on tight. Doing that cured all of my cluster issues in my wife's '87 325."A good memory for quotes combined with a poor memory for attribution can lead to a false sense of originality."
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91 318is Turbo Sold
87 325 Daily driver Sold
06 4.8is X5
06 Mtec X3
05 4.4i X5 Sold
92 325ic Sold & Re-purchased
90 325i Sold
97 328is Sold
01 323ci Sold
92 325i Sold
83 528e Totaled
98 328i Sold
93 325i SoldComment
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Before I get into it and have it all apart, does it take a special battery or can I buy it at walmart?WTB late model, anywhere on the east coast will go as far west as Texas for the right car at the right price. 5 speed 6cyl only.
"She may not look like much, but she's got it where it counts, kid." - Han SoloComment
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SearchMtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205
OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827Comment
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I did, some people talk about AA's, but they look like they are about 1/3 the length of a AA. Also one thread said that "my coolant temp sensor works, so the SI batteries are good". Well my coolant temp gauge works good too... does that mean something else is wrong?
Guess I'll just have to take it apart and see for myself.WTB late model, anywhere on the east coast will go as far west as Texas for the right car at the right price. 5 speed 6cyl only.
"She may not look like much, but she's got it where it counts, kid." - Han SoloComment
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Different years/brand clusters use different batteries. If your service interval lights will reset and work properly, then your batteries are good and the culprit is either the gauge or the board/connection to it."A good memory for quotes combined with a poor memory for attribution can lead to a false sense of originality."
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91 318is Turbo Sold
87 325 Daily driver Sold
06 4.8is X5
06 Mtec X3
05 4.4i X5 Sold
92 325ic Sold & Re-purchased
90 325i Sold
97 328is Sold
01 323ci Sold
92 325i Sold
83 528e Totaled
98 328i Sold
93 325i SoldComment
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yea the green yellow and red lights stay on and sometimes blink but even when the cars off they are on.Comment
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^Then your batteries are shot. The batteries will need to be soldered in in most cases. If you're not comfortable doing that they sell reman'd boards."A good memory for quotes combined with a poor memory for attribution can lead to a false sense of originality."
-----------------------------------------
91 318is Turbo Sold
87 325 Daily driver Sold
06 4.8is X5
06 Mtec X3
05 4.4i X5 Sold
92 325ic Sold & Re-purchased
90 325i Sold
97 328is Sold
01 323ci Sold
92 325i Sold
83 528e Totaled
98 328i Sold
93 325i SoldComment
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I just took out my board and soldered new batteries in (I used energizer 2500mah rechargeable batteries). I don't know how long it will last but it fixed my tach and service lights. However, my mpg gauge still doesn't work. I would think some sort of sender was bad, but the OBC mpg indicators still work, and afaik the obc takes most of it's inputs from the dash.
I'm baffled, but I'm pretty satisfied that at least my tach works.WTB late model, anywhere on the east coast will go as far west as Texas for the right car at the right price. 5 speed 6cyl only.
"She may not look like much, but she's got it where it counts, kid." - Han SoloComment
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right on im goin to try that thanks guys!Comment
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