MAF & MAP Sensors

2004 2.0TDi BKD engine.

My car was feeling a little sluggish and producing quite a bit of black smoke and the mpg had dipped so thought I'd refresh the MAF and whilst at it the MAP sensors.

I bought some cheap-ish ones from Autodoc. They were apparently the same as the OEM items. They seemed fine and fit well. The car drove well but something felt a bit 'off'. Couldn't put my finger on it but it had the occasional hic-cup at lower revs in traffic.

Bit the bullet and bought Bosch replacements and immediately the car felt better, smoother and quiter and that was just starting it and idling. On a test drive it felt smoother with a little more low down torque. Maybe placebo but better than the cheap parts.

Lesson learnt - don't buy cheap sensors. They are not as good. Also the MAP sensor was a pig to get to.