OE 025906041A — Coolant Temperature Sensor for Audi

Incoming batches pass a dimensional check, a material look-up against the electrical & sensors specification, and a visual inspection for finish defects. Critical dimensions are measured per carton and the photographs are archived against the order number.

Standard minimum order is 10 pieces per part number. Mixed orders that combine 025906041A with other electrical & sensors references are welcome — that is how most clients fill an LCL or FCL container without over-stocking a single line.

Start from the code cast or printed on the part you are removing — that is the authoritative source. If it is illegible, use the Applications table on the closest electrical & sensors reference and narrow by build year. Send photos and we will cross-check the number for you.

OEM means the part was produced for the vehicle maker's assembly line; aftermarket means it is made independently to the same engineering drawing. For a coolant temperature sensor the practical gap is usually tooling age and packaging rather than fit, provided the tolerance class matches.

The Related OE References table above lists the alternates we see most often in trade inquiries. Cross-references work because the engineering envelope is shared across the electrical & sensors family — always confirm dimensions and connector layout before you swap.

Noise normally traces to worn internal surfaces, a loose mount, a dry bearing or contact with a neighbouring part. Isolate it by reproducing the sound at a fixed speed, then compare against the reference photo for 025906041A to confirm the right replacement.