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Lambda Sensor DELPHI ES20521-12B1
O2 Sensor DELPHI ES20521-12B1. Fits 26 car models (MERCEDES-BENZ, SMART). Replaces 4 OE numbers.

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£71.99 Save £22.00 (31%)
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Specification. From the manufacturer's data.
- Brand
- DELPHI
- Category
- O2 Sensor
- Cable Length [mm]
- 325 mm
- MPN
- ES20521-12B1
- SKU
- 0089-ES20521-12B1
- GTIN / EAN
- 5012759975503
- What's included
- 1x O2 Sensor
OE numbers. The originals this part replaces.
Numbers the vehicle makers and other brands use for this part. Only a confirmed OE number links to its own page; other brands' equivalents are under “Equivalent products”.
- MERCEDES-BENZ0035428218
- MERCEDES-BENZ / SMART004 5420 718
- MERCEDES-BENZA0035428218
- MERCEDES-BENZA004 5420 718
Equivalent products. They fit in the same place.
4 available · 30 numbers In stock from £51.99 to £250.99.
Last one! Only 1 left
In stock
Last one! Only 1 left
All 30 cross-reference numbers
Numbers other makers give for this part. They are aftermarket numbers, not the vehicle maker's OE numbers; a linked number is one we sell.
- BBT OXY461.050
- BorgWarner (BERU) 0824010372
- BorgWarner (BERU) OPH087
- BOSCH 0 258 006 687
- BOSCH 0 258 006 749
- DENSO DOX-2044
- EFI 301616
- ELTA AUTOMOTIVE LEB4029
- ELTA AUTOMOTIVE XLS1499
- ERA 570104
- FACET 10.8202
- FEBI BILSTEIN 38486
- FISPA 90194
- FUELPARTS LB1954
- HOFFER 7481574
- INTERMOTOR 64577
- INTERMOTOR 64577
- INTERMOTOR KNL564
- INTERMOTOR KNL564
- INTERMOTOR LLB510
- INTERMOTOR LLB510
- MEAT & DORIA 81574
- METZGER AUTOTEILE 0893183
- MOTAQUIP LVOS1500
- NGK 91974
- NGK 91974
- NGK OZA683-EE20
- NGK OZA683-EE20
- QUINTON HAZELL XLOS1474
- VEMO V30-76-0039
Compatible cars. MERCEDES-BENZ, SMART, 26 models.
Matched from the manufacturer's data.
| Model | Engines | Years |
|---|---|---|
| MERCEDES-BENZ24 models | ||
| MERCEDES-BENZ A-CLASS (W169) | A 150 (169.031, 169.331), A 160 (169.031, 169.331), A 170 (169.032, 169.332), A 180 (169.032, 169.332), A 200 TURBO (169.034, 169.334) | 2004–2012 |
| MERCEDES-BENZ B-CLASS Sports Tourer (W245) | B 150 (245.231), B 160 (245.231), B 170 (245.232), B 170 NGT (245.233), B 180 (245.232), B 180 NGT (245.233), B 200 (245.233), B 200 TURBO (245.234) | 2005–2011 |
| MERCEDES-BENZ C-CLASS (W203) | 3.5 (203.056), C 230 (203.052), C 280 (203.054), C 350 (203.056) | 2000–2007 |
| MERCEDES-BENZ C-CLASS (W204) | C 230 (204.052), C 280 (204.054), C 300 (204.054), C 350 (204.056), C 350 CGI (204.065), C 63 AMG (204.077), C 63 AMG DR 520 | 2007–2015 |
| MERCEDES-BENZ C-CLASS Coupe (C204) | C 63 AMG (204.377) | 2011– |
| MERCEDES-BENZ C-CLASS Coupe (CL203) | C 230 (203.752), C 350 (203.756) | 2001–2011 |
MERCEDES-BENZ18 more models
| Model | Engines | Years |
|---|---|---|
| MERCEDES-BENZ C-CLASS T-Model (S203) | C 230 (203.252), C 280 (203.254), C 350 (203.256) | 2001–2007 |
| MERCEDES-BENZ C-CLASS T-Model (S204) | C 230 (204.252), C 250 (204.252), C 280 (204.254), C 300 (204.254), C 350 (204.256), C 63 AMG, C 63 AMG (204.277) | 2007–2014 |
| MERCEDES-BENZ CLC-CLASS (CL203) | CLC 230 (203.752), CLC 250, CLC 350 (203.756) | 2008–2011 |
| MERCEDES-BENZ CLK (C209) | CLK 280 (209.354), CLK 350 (209.356), CLK 500 (209.372), CLK 63 AMG (209.377) | 2002–2010 |
| MERCEDES-BENZ CLK Convertible (A209) | CLK 280 (209.454), CLK 350 (209.456), CLK 500 (209.472), CLK 63 AMG (209.477) | 2002–2010 |
| MERCEDES-BENZ CLS (C219) | CLS 280 (219.354), CLS 300 (219.354), CLS 350 (219.356), CLS 350 (219.357), CLS 500 (219.372) | 2004–2011 |
| MERCEDES-BENZ E-CLASS (W211) | E 230 (211.052), E 280 (211.054), E 350 CGI (211.057), E 500 (211.072) | 2002–2009 |
| MERCEDES-BENZ E-CLASS (W212) | E 250 (212.052), E 300 (212.054), E 350 (212.056), E 350 CGI (212.057), E 500 (212.072) | 2009–2016 |
| MERCEDES-BENZ E-CLASS Convertible (A207) | E 350 (207.456), E 350 CGI (207.457), E 500 (207.472) | 2010–2016 |
| MERCEDES-BENZ E-CLASS Coupe (C207) | E 350 (207.356), E 350 CGI (207.357), E 500 (207.372) | 2009–2016 |
| MERCEDES-BENZ E-CLASS T-Model (S211) | 350 CGI (211.257), E 230 T (211.252), E 280 T (211.254), E 350 T (211.256), E 500 T (211.272) | 2003–2009 |
| MERCEDES-BENZ E-CLASS T-Model (S212) | E 300 (212.254), E 350 (212.256), E 350 CGI (212.257), E 500 (212.272) | 2009–2016 |
| MERCEDES-BENZ GL-CLASS (X164) | GL 450 4-matic (164.871), GL 500 4-matic (164.886) | 2006–2012 |
| MERCEDES-BENZ GLK-CLASS (X204) | 350 (204.956) | 2008–2015 |
| MERCEDES-BENZ M-CLASS (W164) | ML 300 4-matic (164.182), ML 350 4-matic (164.186), ML 500 4-matic (164.172) | 2005–2012 |
| MERCEDES-BENZ R-CLASS (W251, V251) | R 280 (251.054, 251.154), R 280 4-matic (251.062), R 300 (251.054, 251.154), R 300 4-matic (251.062), R 350 (251.056, 251.156), R 350 4-matic (251.065, 251.165), R 500 4-matic (251.072, 251.172) | 2005–2017 |
| MERCEDES-BENZ SL (R230) | 280 (230.454), 300 (230.454), 350 (230.456), 350 (230.458), 500 (230.471), 63 AMG (230.470) | 2001–2012 |
| MERCEDES-BENZ SLK (R171) | 280 (171.454), 300 (171.454), 350 (171.456), 350 (171.458) | 2004–2011 |
SMART2 models
| Model | Engines | Years |
|---|---|---|
| SMART FORTWO Cabrio (451) | 1.0 (451.431, 451.480) | 2007– |
| SMART FORTWO Coupe (451) | 1.0 (451.330, 451.334), 1.0 (451.331, 451.380) | 2007– |
Always verify compatibility with your vehicle before ordering.
More about this part. Related categories and similar parts.
DELPHI
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Common OE numbers for this part
Common original equipment numbers linked to replacement-part pages.
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2-year warranty against manufacturing defects on all parts, counted from delivery. 14-day money-back guarantee if the part doesn't fit your vehicle. Delivery terms
We ship from the EU to 201 countries. Deliveries within the EU carry no customs charges; outside the UK and the EU, the destination country may charge import duties and taxes, paid on delivery. Delivery times and prices by country
Delivery times to EU countries (working days)
Austria 4–7, Belgium 4–7, Bulgaria 5–9, Croatia 5–9, Cyprus 4–19, Czechia 4–7, Denmark 4–8, Estonia 3–4, Finland 6–10, France 5–8, Germany 3–5, Greece 6–10, Hungary 4–7, Ireland 5–9, Italy 5–9, Latvia 2–3, Lithuania 2–3, Luxembourg 4–7, Malta 4–9, Netherlands 4–7, Poland 3–6, Portugal 6–10, Romania 4–8, Slovakia 4–7, Slovenia 4–8, Spain 6–9, Sweden 5–10