A couple months ago, I purchased a 2005 Vanden Plas with 102,000 miles. Because of its age and mileage, I replaced all of the filters, fluids, coils, and plugs. She is running smooth with a steady idle. No DTC codes.

As part of this update, I want to replace the Mass Air Flow Sensor. I ordered a Delphi AF10135 (e.g., Rockauto has it), which was listed as a good match. However, once installed, the engine stalled after one second, every time.

I reinstalled the old MAFS and the engine had no problem. The old one is a Denso MB197400-3021. I can find that part number also associated with my car (and it does work).

I’d like a recommendation as to what MAFS to use. Any thoughts on why the Delphi failed?

Thank you for your suggestions.

--marvin

 

On my SV8 I replaced the MAF with one from Denso. As in your case, the original one was also from Denso. No issues at all, the car runs fine.

Best regards,

Thomas

 

Thanks. There are quite a few "cheap" versions of the Denso model...and I'm not sure whether spending more gets you more. I found two posts that when it comes to MAF "buy the cheapest" is viewed as fine.

I had forgotten to mention that my serial number is G45996 ~ that may be consequential.

 

I do not remember whether the one I bought was the cheapest, but as most of the electronics seem to come from Denso, I stuck to that brand.

I could go and check the part number of it, but then I do not know whether Jaguar used the same item on both supercharged and n/a cars.

Best regards,

Thomas

 

Thanks, Thomas. I am pretty sure the Supercharged folks use a different one.

 

I thought I should wrap up this thread by saying what I did and the consequence. I bought a cheap never-heard-of-brand Mass Air Flow sensor that had one of the correct part numbers on it (literally, the number is on the plastic mold) 1X4312B579-AB for $30 from Amazon. The new unit caused a stutter upon start-up and I had to give the engine a bit of accelarator pedal to keep things running. What I figured was the data the new MAF sensor was sending to the computers were significantly different than the data which created the existing tables ~ in other words, the ECU needed time to find its idle. After 5 minutes of running the engine was purring at a steady 660 RPM. No DTCs. If the sensor burps at some point I'll follow-up this note.

--marvin

 

interesting