DELPHI Lambda zonde ES20521-12B1

Compatible with MERCEDES-BENZ C-CLASS Coupe (C204) , MERCEDES-BENZ E-CLASS T-Model (S212) , MERCEDES-BENZ E-CLASS (W212) Show more info
This DELPHI Lambda zonde is designed for optimal engine performance and fuel efficiency. Ensure your vehicle's emissions are within regulations with this high-quality component.
46.50 EUR
inc. VAT 21%
In stock 2
Delivery 1 day (15.05.2026)
PN ES20521-12B1
Make DELPHI
EAN 5012759975503

The DELPHI Lambda zonde ES20521-12B1 is engineered to provide accurate oxygen level readings to your vehicle's engine control unit (ECU). This precise data allows the ECU to adjust the air-fuel mixture for optimal combustion, leading to improved fuel economy and reduced emissions. Crafted with durable materials, this Lambda zonde is built to withstand the harsh conditions of the exhaust system. Its reliable performance ensures consistent operation, helping to maintain your engine's health and prevent potential check engine light issues. Proper functioning of the Lambda zonde is crucial for meeting environmental standards and ensuring your vehicle runs smoothly. Replacing a faulty Lambda zonde with this DELPHI unit can restore your vehicle's performance and efficiency. It is a direct fit for compatible models, simplifying the installation process. Trust DELPHI for quality components that deliver dependable results.

  • Ensures accurate oxygen sensor readings for optimal engine performance.
  • Contributes to improved fuel efficiency and reduced emissions.
  • Durable construction for long-lasting reliability in the exhaust system.
  • Helps prevent check engine light illumination.
  • Designed for precise air-fuel mixture control.
  • Facilitates compliance with environmental regulations.
  • Direct fit for easy installation.
  • High-quality component from DELPHI.
Cable length [mm]
325
Oxygen sensor
Planar type lambda sensor
Oxygen sensor
with heating
  • MERCEDES-BENZ
    • C-CLASS Coupe (C204)
      • C 63 AMG (204.377) (380kW/517PS)
    • E-CLASS T-Model (S212)
      • E 350 (212.256) (200kW/272PS)
      • E 350 CGI (212.257) (215kW/292PS)
      • E 500 (212.272) (285kW/388PS)
      • E 300 (212.254) (170kW/231PS)
    • E-CLASS (W212)
      • E 300 (212.054) (170kW/231PS)
      • E 350 CGI (212.057) (215kW/292PS)
      • E 500 (212.072) (285kW/388PS)
      • E 350 (212.056) (200kW/272PS)
      • E 250 (212.052) (150kW/204PS)
    • GLK-CLASS (X204)
      • 350 (204.956) (200kW/272PS)
    • E-CLASS Kabriolets (A207)
      • E 350 (207.456) (200kW/272PS)
      • E 350 CGI (207.457) (215kW/292PS)
      • E 500 (207.472) (285kW/388PS)
    • C-CLASS T-Model (S204)
      • C 63 AMG (204.277) (358kW/487PS)
      • C 230 (204.252) (150kW/204PS)
      • C 280 (204.254) (170kW/231PS)
      • C 350 (204.256) (200kW/272PS)
      • C 63 AMG (204.277) (336kW/457PS)
      • C 300 (204.254) (170kW/231PS)
      • C 63 AMG (373kW/507PS)
      • C 250 (204.252) (150kW/204PS)
    • SLK (R171)
      • 350 (171.456) (200kW/272PS)
      • 280 (171.454) (170kW/231PS)
      • 350 (171.458) (224kW/305PS)
      • 300 (171.454) (170kW/231PS)
    • C-CLASS (W204)
      • C 63 AMG (204.077) (358kW/487PS)
      • C 230 (204.052) (150kW/204PS)
      • C 280 (204.054) (170kW/231PS)
      • C 350 (204.056) (200kW/272PS)
      • C 63 AMG (204.077) (336kW/457PS)
      • C 350 CGI (204.065) (215kW/292PS)
      • C 300 (204.054) (170kW/231PS)
      • C 63 AMG (204.077) (373kW/507PS)
    • CLS (C219)
      • CLS 350 (219.356) (200kW/272PS)
      • CLS 350 (219.357) (215kW/292PS)
      • CLS 500 (219.372) (285kW/388PS)
      • CLS 280 (219.354) (170kW/231PS)
      • CLS 300 (219.354) (170kW/231PS)
    • A-CLASS (W169)
      • A 170 (169.032, 169.332) (85kW/116PS)
      • A 150 (169.031, 169.331) (70kW/95PS)
      • A 200 TURBO (169.034, 169.334) (142kW/193PS)
      • A 160 (169.031, 169.331) (70kW/95PS)
      • A 180 (169.032, 169.332) (85kW/116PS)
    • B-CLASS Sports Tourer (W245)
      • B 170 (245.232) (85kW/116PS)
      • B 200 (245.233) (100kW/136PS)
      • B 200 TURBO (245.234) (142kW/193PS)
      • B 150 (245.231) (70kW/95PS)
      • B 170 NGT (245.233) (85kW/116PS)
      • B 180 NGT (245.233) (85kW/116PS)
      • B 160 (245.231) (70kW/95PS)
      • B 180 (245.232) (85kW/116PS)
    • M-CLASS (W164)
      • ML 350 4-matic (164.186) (200kW/272PS)
      • ML 500 4-matic (164.172) (285kW/388PS)
    • E-CLASS (W211)
      • E 280 (211.054) (170kW/231PS)
      • E 500 (211.072) (285kW/388PS)
      • E 350 CGI (211.057) (215kW/292PS)
      • E 230 (211.052) (150kW/204PS)
    • E-CLASS T-Model (S211)
      • E 280 T (211.254) (170kW/231PS)
      • E 350 T (211.256) (200kW/272PS)
      • E 500 T (211.272) (285kW/388PS)
      • 350 CGI (211.257) (215kW/292PS)
      • E 230 T (211.252) (150kW/204PS)
    • C-CLASS Coupe (CL203)
      • C 350 (203.756) (200kW/272PS)
      • C 230 (203.752) (150kW/204PS)
    • CLK Kabriolets (A209)
      • CLK 350 (209.456) (200kW/272PS)
      • CLK 280 (209.454) (170kW/231PS)
      • CLK 63 AMG (209.477) (354kW/481PS)
      • CLK 500 (209.472) (285kW/388PS)
      • CLK 63 AMG (209.477) (354kW/481PS)
    • CLK (C209)
      • CLK 350 (209.356) (200kW/272PS)
      • CLK 280 (209.354) (170kW/231PS)
      • CLK 63 AMG (209.377) (354kW/481PS)
      • CLK 500 (209.372) (285kW/388PS)
      • CLK 63 AMG (209.377) (373kW/507PS)
    • C-CLASS (W203)
      • C 280 (203.054) (170kW/231PS)
      • C 350 (203.056) (200kW/272PS)
      • C 230 (203.052) (150kW/204PS)
    • C-CLASS T-Model (S203)
      • C 350 (203.256) (200kW/272PS)
      • C 280 (203.254) (170kW/231PS)
      • C 230 (203.252) (150kW/204PS)
    • R-CLASS (W251, V251)
      • R 350 4-matic (251.065, 251.165) (200kW/272PS)
      • R 280 (251.054, 251.154) (170kW/231PS)
      • R 350 (251.056, 251.156) (200kW/272PS)
      • R 500 4-matic (251.072, 251.172) (285kW/388PS)
      • R 300 (251.054, 251.154) (170kW/231PS)
      • R 300 4-matic (251.062) (170kW/231PS)
    • GL-CLASS (X164)
      • GL 450 4-matic (164.871) (250kW/340PS)
      • GL 500 4-matic (164.886) (285kW/388PS)
    • SL (R230)
      • 350 (230.456) (200kW/272PS)
      • 500 (230.471) (285kW/388PS)
      • 350 (230.458) (232kW/316PS)
      • 63 AMG (230.470) (386kW/525PS)
      • 280 (230.454) (170kW/231PS)
      • 300 (230.454) (170kW/231PS)
    • CLC-CLASS (CL203)
      • CLC 230 (203.752) (150kW/204PS)
      • CLC 350 (203.756) (200kW/272PS)
      • CLC 250 (150kW/204PS)
    • E-CLASS Coupe (C207)
      • E 350 CGI (207.357) (215kW/292PS)
      • E 500 (207.372) (285kW/388PS)
  • SMART
    • FORTWO Coupe (451)
      • 1.0 (451.330, 451.334) (45kW/61PS)
      • 1.0 (451.331, 451.380) (52kW/71PS)
    • FORTWO Cabrio (451)
      • 1.0 (451.431, 451.480) (52kW/71PS)
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