A/C Compressor Mechanical Valve – Denso ECV11 | Nissan BMW Mercedes | OEM DCS171C
The Denso ECV11 mechanical A/C compressor control valve (OEM DCS171C / Zexel-Seltec DCS171C) controls compressor displacement via suction pressure on Nissan Altima, Sentra, 350Z, BMW, and Mercedes-Benz models. When the valve fails or wears, the compressor runs at reduced displacement — resulting in weak or inadequate cooling.
Fits OEM #DCS171C.
Important! Before ordering, compare the appearance of the valve with the valve installed on your vehicle. Depending on the model year, engine, and vehicle configuration, different compressor and control valve versions may be used.
When to Inspect This Part
- weak or intermittent A/C cooling
- unstable vent temperature
- A/C compressor runs continuously
- refrigerant-pressure fault
What's Included
- 1× Denso ECV11 mechanical control valve (OEM DCS171C / 97701-2P110 / 977012P110)
OEM Part Numbers and Vehicle Fitment
Additional confirmed fitment
- Nissan Altima 2.5L (2013–2018)
- Nissan 350Z 3.5L (2007–2009)
- BMW
- Mercedes-Benz
Part Number / PN
DCS171C
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 DCS171C is the primary fitment check.
FAQ
How do I confirm fitment for this A/C Compressor Mechanical Valve?
Compare the exact OEM/P/N and physical design with the installed part. The primary reference is DCS171C. Do not select the part by vehicle model alone.
What symptoms may indicate a problem with this A/C Compressor Mechanical Valve?
Confirmed symptoms include weak or intermittent A/C cooling, unstable vent temperature, A/C compressor runs continuously, refrigerant-pressure fault. Diagnose the original assembly before ordering so another fault is not mistaken for this part.
What is included with this A/C Compressor Mechanical Valve?
The confirmed kit contents are: 1× Denso ECV11 mechanical control valve (OEM DCS171C / 97701-2P110 / 977012P110).
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