Speed Sensor Kit – Mercedes 722.9 7G-Tronic Automatic Transmission | Y3/8n1 Y3/82
The Mercedes 722.9 7G-Tronic automatic transmission uses two speed sensors (Y3/8n1 and Y3/82) to monitor input and output shaft speeds. When either sensor fails, the TCU cannot calculate correct gear ratios — causing gear selection faults, harsh shifting, limp mode, and transmission warning lights. Mercedes-Benz models with 722.9 7G-Tronic 7-speed automatic transmission
Fits OEM #A0335457332.
What's Included
- Speed sensor Y3/8n1 (input shaft)
- Speed sensor Y3/82 (output shaft)
Part Number / PN
A0335457332, A0034460310
Important Fitment Check
Before ordering, compare the part design, dimensions, connectors, and every available OEM/P/N marking with the part installed on the vehicle. Matching OEM/P/N A0335457332 is the primary fitment check.
FAQ
How do I confirm fitment for this Speed Sensor Kit?
Compare the exact OEM/P/N and physical design with the installed part. The primary reference is A0335457332. Do not select the part by vehicle model alone.
When should this Speed Sensor Kit be replaced?
Replace it when inspection confirms wear, damage, loss, or incorrect fit. Compare the original part and mounting dimensions before ordering.
What is included with this Speed Sensor Kit?
The confirmed kit contents are: Speed sensor Y3/8n1 (input shaft), Speed sensor Y3/82 (output shaft).
Does this listing include the complete surrounding assembly?
No. It includes only the item or repair components identified for this SKU. Inspect related parts separately and replace them only when diagnosis confirms a fault.
What should be checked before installation?
Check the OEM/P/N, dimensions, connectors, orientation, and condition of the mating components. Installation should follow the correct service procedure for the specific vehicle and assembly.
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Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings