Automotive SMD resistors

[Audiorepair]

I don't normally repair car stuff, but this was foisted on me today by a friend who didn't want to take no for an answer, as it would cost him dear otherwise.

It's a BMW media control unit, which sits in the boot of the car, apparently. 
It had some water damage, including a 1 ohm resistor which needs replacing.

I haven't seen SMD resistors like these before, and scrolling through those available at Farnell I didn't see anything that looked similar, so I don't know why they are packaged like this.

I suspect from the circuitry they are not massively high power, maybe this is some kind of environmental car thing instead.


Photo attached.

[TheMG]

I believe those are inductors, not resistors.

Likely 1uH (1R0), 10% tolerance (K).

Why they use "R" in the numbering for an inductor, I don't know, but that's something they do.

From the triangle and the letter T, looks like TDK / EPCOS part.

https://product.tdk.com/en/search/inductor/inductor/smd/list#ref=characteristic&2l%5Bunit%5D=1.00E-06&2l%5Bt%5D=1&2ltol%5B%5D=%C2%B110%25&psts%5B%5D=0&_l=20&_p=1&_c=part_no-part_no&_d=0

[Audiorepair]

Doh!
I think you are correct.


Exit stage left hoping nobody notices.

[inse]

Is one of them open, or how did you diagnose it to have failed?
It looks like some kind of supply line filtering, you could bypass the coil for test purpose.

[Audiorepair]

Is one of them open, or how did you diagnose it to have failed?
It looks like some kind of supply line filtering, you could bypass the coil for test purpose.

The PCB was corroded, the inductor was detached from one pad, and when I removed it the corroded solder terminal fell off.

I can't test this module, I don't have a BMW to plug it into. 
I am repairing it with the understanding I can only repair visibly obvious faults, and can't test it.

This why I don't repair car stuff.

[Audiorepair]

I believe those are inductors, not resistors.

Likely 1uH (1R0), 10% tolerance (K).

Why they use "R" in the numbering for an inductor, I don't know, but that's something they do.

From the triangle and the letter T, looks like TDK / EPCOS part.

https://product.tdk.com/en/search/inductor/inductor/smd/list#ref=characteristic&2l%5Bunit%5D=1.00E-06&2l%5Bt%5D=1&2ltol%5B%5D=%C2%B110%25&psts%5B%5D=0&_l=20&_p=1&_c=part_no-part_no&_d=0

Thanks,

I found this at Farnell, looks like it will do the job.

https://uk.farnell.com/tdk/nlcv32t-1r0m-efr/inductor-1uh-20-1-7a-100mhz-3225/dp/2747759