A/C Low on Your Nissan, BMW, or Mercedes? Replace the ECV11 Valve for $31.
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.
✓ What You Get: Denso ECV11 mechanical A/C compressor control valve (OEM DCS171C, 97701-2P110, 977012P110) for Nissan Altima 2.5/3.5, Sentra 2.0/2.5, 350Z 3.5, BMW, Mercedes-Benz, and selected Hyundai/Kia models.
What's Included
- 1× Denso ECV11 mechanical control valve (OEM DCS171C / 97701-2P110 / 977012P110)
Why Replace?
- Restores A/C Cooling: Worn ECV11 valve reduces compressor displacement and cuts cooling output.
- Mechanical Simplicity: Pressure-driven — no solenoid, no electrical failure modes.
- Saves vs Compressor: New Denso compressor $200+; ECV11 valve swap costs $31.
- 30-Minute Job: Access compressor valve port, swap valve, reseal.
Vehicle Compatibility
| Make | Models | Compressor |
|---|---|---|
| Nissan | Altima 2.5/3.5, Sentra 2.0/2.5, 350Z 3.5 | Denso ECV11 |
| Hyundai / Kia | Selected models — verify compressor OEM 97701-2P110 | Denso ECV11 |
| BMW / Mercedes-Benz | Various — verify compressor model | Denso ECV11 |
About This Control Valve
Denso ECV11 mechanical A/C compressor control valve (OEM DCS171C, 97701-2P110, 977012P110, also Zexel-Seltec DCS171C) is used in Denso variable-displacement compressors on Nissan, BMW, Mercedes-Benz, Hyundai, and Kia platforms. The ECV11 is a mechanical suction-pressure-sensitive valve — it requires no electrical input, making diagnosis straightforward: if A/C output is low and high-side/low-side pressures are off-spec, the ECV11 is typically the first component to replace.
⚠ Verify Before Ordering: Confirm your compressor uses an ECV11 / DCS171C / 97701-2P110 (977012P110) valve before purchasing.
Cross Reference Numbers
AC-02DN10, AC02DN10, AC-02DN11, AC02DN11
OEM Numbers
DCS171C, 97701-2P110, 977012P110
Part Number / PN
DCS171C, 97701-2P110, 977012P110, AC-02DN10, AC02DN10, AC-02DN11, AC02DN11
Read All
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