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Mercedes W121 190 SL Spark plugs (105 hp Petrol M 121.921)

Recommended Spark plugs replacement interval for Mercedes W121 190 SL (121.042, 121.040) 105hp: every 10.000 km

Recommended part replacement interval for your car for the part category Spark plugs: every 10.000 km / every 18 months

Best spark plugs for MERCEDES-BENZ SL 190 SL (121.042, 121.040) petrol
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  • Product line: ULTRA
  • Spark Plug: 1 - Earthed Electrode, with gasket seat
  • Electrode Gap [mm]: 0,7
  • Spanner Size: 21 mm
  • Thread Length [mm]: 19
  • Thread Size: M14x1,25
  • Connector type: SAE / M4
  • Required quantity: 4
  • Tightening torque from [Nm]: 20
  • Tightening torque to [Nm]: 30
  • Item number: 686S0194
  • Manufacturer: RIDEX
  • EAN number: 4064138236607
  • Condition: New
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In stock
-38%
compared to RRP £4.20

£2.59
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RIDEX 686S0012 Spark plug Spanner Size: 20,8
Article number: 686S0012
Reviews - 22
    • Engine Code: M 121 B.I<121.920>
    • Construction Year to: 02 / 1963
  • Spark Plug: 1 - Earthed Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 20,8
  • External Thread [mm]: 14
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3
  • Thread Pitch [mm]: 1,25
  • Tightening Torque [Nm]: 28
  • Number of pins: 1
  • Tightening angle [degrees]: 90
  • Item number: 686S0012
  • Manufacturer: RIDEX
  • EAN number: 4059191685325
  • Condition: New
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In stock
-28%
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£2.99
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686S0137P Spark plug Mercedes-Benz SL 190SL (121.042, 121.040) 105 hp 77 kW M 121.921 1957 W121 RIDEX PLUS Iridium 686S0137P Mercedes W121 190SL (121.042, 121.040) Spark plug 105 hp Petrol 1961 cost
RIDEX PLUS Iridium 686S0137P Spark plug CNG/LPGM14x1,25, Spanner Size: 20.6
Article number: 686S0137P
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    • Engine Code: M 121.921, M 121.928
    • Required quantity: 4
    • Fuel Type: CNG / LPG
  • Product line: Iridium
  • Spark Plug: 1 - Earthed Electrode, Iridium Middle Electrode, Nickel mass electrode
  • Spanner Size: 20.6
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3,3
  • Thread Size: M14x1,25
  • Connector type: Solid SAE
  • Diameter [mm]: 14
  • Resistor [kOhm]: 6
  • Country Specific Design: Japan
  • Item number: 686S0137P
  • Manufacturer: RIDEX PLUS
  • EAN number: 4067448729876
  • Condition: New
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£11.99
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STARK SKSP-1990011 Spark plug Spanner Size: 20,8
Article number: SKSP-1990011
Reviews - 5
    • Engine Code: M 121 B.I<121.920>
    • Construction Year to: 02 / 1963
  • Spark Plug: 1 - Earthed Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 20,8
  • External Thread [mm]: 14
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3
  • Thread Pitch [mm]: 1,25
  • Tightening Torque [Nm]: 28
  • Number of pins: 1
  • Tightening angle [degrees]: 90
  • Item number: SKSP-1990011
  • Manufacturer: STARK
  • EAN number: 4059191393190
  • Condition: New
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In stock
-69%
compared to RRP £4.19

£1.29
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    • Engine Code: M 121.921, M 121.928
    • Fuel Type: CNG / LPG
    • Required quantity: 4
  • Product line: Iridium TT
  • Spark Plug: 1 - Earthed Electrode, Iridium Middle Electrode
  • Spanner Size: 20.6
  • Thread Length [mm]: 19
  • Thread Size: M14x1.25
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Item number: SKSP-1990136
  • Manufacturer: STARK
  • EAN number: 4064138064606
  • Condition: New
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In stock
-43%
compared to RRP £21.40

£11.99
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  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • TecDoc Engine Number: M 121.921
  • Item number: 2412
  • Manufacturer: NGK
  • EAN number: 0087295124123
  • Condition: New
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In stock
-27%
compared to RRP £4.51

£3.29
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  • Spark Plug: Unscrewable SAE connector, Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • TecDoc Engine Number: M 121.921
  • Item number: 4055
  • Manufacturer: NGK
  • EAN number: 0087295140550
  • Condition: New
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In stock
-34%
compared to RRP £19.80

£12.99
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  • Product line: Powersport
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Copper Centre Electrode
  • Electrode Gap [mm]: 0,9
  • Spanner Size: 21 mm
  • Quality / Grade: Nickel GE
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Required quantity: 4
  • Packing Type: Box
  • Technical Information Number: N9YC
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 8,65
  • Packaging width [cm]: 2,45
  • Packaging height [cm]: 2,45
  • Projection [mm]: 1,5
  • Item number: OE001/T10
  • Manufacturer: CHAMPION
  • EAN number: 5010874505605
  • Condition: New
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In stock
-40%
compared to RRP £5.02

£2.99
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BOSCH 0 242 240 592 Spark plug M 14 x 1,25, Spanner Size: 20,8
Article number: 0 242 240 592
Reviews - 52
    • Engine Code: M 121 B.I<121.920>
    • Construction Year to: 02 / 1963
    • Required quantity: 4
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 20,8
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3
  • Thread Size: M 14 x 1,25
  • Tightening Torque [Nm]: 28
  • Number of pins: 1
  • Item number: 0 242 240 592
  • Manufacturer: BOSCH
  • EAN number: 3165143134429
  • Condition: New
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£3.59
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    • TecDoc Engine Number: M 121.921, M 121.928
    • Required quantity: 4
  • Product line: Nickel
  • Spark Plug: 1 - Earthed Electrode, Nickel Middle Electrode
  • Spanner Size: 20.6 mm
  • Thread Length [mm]: 19
  • Thread Size: M14x1.25
  • Connector type: Removable SAE
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 56
  • for OE number: 09482-00392
  • alternative item: W20TT
  • Item number: W20EP-U
  • Manufacturer: DENSO
  • EAN number: 042511030435
  • Condition: New
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£2.99
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DENSO Iridium TT IW20TT Spark plug CNG/LPGM14x1.25,
Article number: IW20TT
Reviews - 13
    • TecDoc Engine Number: M 121.921, M 121.928
    • Required quantity: 4
    • Fuel Type: CNG / LPG
  • Product line: Iridium TT
  • Spark Plug: with resistor, 1 - Earthed Electrode, Iridium Middle Electrode, Platinum mass electrode
  • Thread Length [mm]: 19
  • Thread Size: M14x1.25
  • Diameter [mm]: 14
  • Gross Weight [g]: 61
  • alternative item: IW20TT
  • Item number: IW20TT
  • Manufacturer: DENSO
  • EAN number: 042511470941
  • Condition: New
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In stock
-38%
compared to RRP £20.42

£12.49
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  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 4,5
  • Thread Size: M14 x 1,25
  • Item number: 5411
  • Manufacturer: NGK
  • EAN number: 0087295154113
  • Condition: New
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£4.59
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    • Required quantity: 4
    • Alternatively
  • Spark Plug: 1 - Earthed Electrode, with gasket seat
  • Electrode Gap [mm]: 0,9
  • Spanner Size: 21 mm
  • Quality / Grade: Poly-V Tit
  • Supplementary Info: ULTRA TITAN
  • Thread Length [mm]: 19
  • Thread Size: M14x1,25
  • Connector type: SAE / M4
  • Tightening torque from [Nm]: 20
  • Tightening torque to [Nm]: 30
  • Resistor from [kOhm]: 3
  • Resistor to [kOhm]: 10
  • Item number: UPT8
  • Manufacturer: BERU
  • EAN number: 4044197961153
  • Condition: New
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In stock
-54%
compared to RRP £12.23

£5.59
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    • Required quantity: 4
    • Alternatively
  • Product line: Aerovantage Spoiler
  • Spark Plug: 1 - Earthed Electrode, with gasket seat
  • Electrode Gap [mm]: 0,9
  • Spanner Size: 21 mm
  • Quality / Grade: Ti Poly-V
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: M4 / SAE
  • Packing Type: Box
  • Technical Information Number: CET8
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 8,85
  • Packaging width [cm]: 2,6
  • Packaging height [cm]: 2,35
  • Resistor from [kOhm]: 3
  • Resistor to [kOhm]: 10
  • Projection [mm]: 1,5
  • Item number: CET8
  • Manufacturer: CHAMPION
  • EAN number: 4044197906833
  • Condition: New
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In stock
-56%
compared to RRP £10.48

£4.59
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  • Spark Plug: Nickel Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat, Fixed SAE connector
  • Spanner Size: 20,8 mm
  • Supplementary Info: BLISTER
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • TecDoc Engine Number: M 121.921
  • Item number: 97416
  • Manufacturer: NGK
  • EAN number: 0087295874165
  • Condition: New
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In stock (Item(s) left: 8)
£4.59
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    • TecDoc Engine Number: M 121.921, M 121.928
    • Required quantity: 4
  • Product line: Nickel TT
  • Spark Plug: 1 - Earthed Electrode, Nickel Middle Electrode
  • Spanner Size: 20.6 mm
  • Thread Length [mm]: 19
  • Thread Size: M14x1.25
  • Connector type: Crimped SAE
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 58
  • alternative item: IW20, IW20TT, IW20
  • Item number: W20TT
  • Manufacturer: DENSO
  • EAN number: 0042511046023
  • Condition: New
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£5.59
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    • TecDoc Engine Number: M 121.921
    • Fuel Type: Liquefied Petroleum Gas (LPG)
  • Spark Plug: Unscrewable SAE connector, Iridium Middle Electrode, 1 - Earthed Electrode, Interference Suppression 5 kOhm, with gasket seat
  • Spanner Size: 20,8 mm
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • Item number: 6684
  • Manufacturer: NGK
  • EAN number: 087295166840
  • Condition: New
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In stock (Item(s) left: 9)
-31%
compared to RRP £21.28

£14.49
Price per item

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  • Spark Plug: Unscrewable SAE connector, Nickel Middle Electrode, 1 - Earthed Electrode, no interference suppression, with gasket seat
  • Spanner Size: 20,8 mm
  • Supplementary Info: Quick
  • Thread Length [mm]: 19,0
  • Spark Position [mm]: 3,0
  • Thread Size: M14 x 1,25
  • TecDoc Engine Number: M 121.921
  • Item number: 3355
  • Manufacturer: NGK
  • EAN number: 0087295033555
  • Condition: New
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In stock
£5.99
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    • Required quantity: 4
    • Alternatively
  • Spark Plug: 1 - Earthed Electrode, with gasket seat, Iridium Middle Electrode
  • Electrode Gap [mm]: 0,8
  • Spanner Size: 21 mm
  • Quality / Grade: Pt GE
  • Thread Length [mm]: 19
  • Spark Position [mm]: 3
  • Thread Size: M14x1.25
  • Connector type: SAE
  • Packing Type: Box
  • Technical Information Number: RN8WYPB3
  • Tightening torque from [Nm]: 25
  • Tightening torque to [Nm]: 30
  • Packaging length [cm]: 10
  • Packaging width [cm]: 2,5
  • Packaging height [cm]: 2,5
  • Resistor from [kOhm]: 3
  • Resistor to [kOhm]: 10
  • Projection [mm]: 1,5
  • Item number: CCH9804
  • Manufacturer: CHAMPION
  • EAN number: 37551009596
  • Condition: New
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In stock
-26%
compared to RRP £24.62

£17.99
Price per item

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  • Product line: Nickel
  • Spark Plug: 1 - Earthed Electrode, Nickel Middle Electrode
  • Spanner Size: 20.6 mm
  • Thread Length [mm]: 19
  • Thread Size: M14x1.25
  • Connector type: Removable SAE
  • Tightening Torque [Nm]: 22
  • Diameter [mm]: 14
  • Weight [g]: 56
  • for OE number: 9993410685100
  • alternative item: -
  • Item number: W9EP
  • Manufacturer: DENSO
  • EAN number: 0042511060050
  • Condition: New
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In stock (Item(s) left: 8)
-7%
compared to RRP £3.56

£3.29
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