I am located in Malaysia, in a tropical country. I have an 88 260E with M103 engine.

The rain in the tropic is usually heavy downpour, and the roads usually have covered with water. My car engine will stall whilst travelling during the rain. After the engine stall, you give it a few cranks, and it will start. Travel for a while, it will stallagain. I have to keep repeating the 2 steps, and luckily, I am able to get home, without stranded in the heavy downpour.

The car runs fine in a normal hot sunny day.

I had the problem previously in mid 2004. My mechanic changed the fuel pump relay in Sept 2004 and the car runs fine, until recently. What do you think is the problem with my car?

I have consulted my spare part guys, and he loan me a OVP to test on. The OVP on my car is 201 540 37 45. My loan unit is also 201 540 37 45. Still can't test because there is no rain!

My part guy later consulted some mechanics, and he told me it is better for M103 to use OVP with PN 201 540 32 45.

After going thru' the old post on OVP, many threads have said 201 540 37 45 is an updated OVP of 201 540 32 45.

Question: Both 201 540 37 45 (dual fuse) and also 201 540 32 45 (single fuse) are still in production. My part guy is saying, if an updated part is available, the old part will be discontinued. The old part is still production, it must be there for some reasons.

Any wisdom thought??

Cheers