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BrandNGK
MPN6637
OE refs221
SKU0015-6637
GTIN / EAN087295166376

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Details

SpecificationValue
BrandNGK
Thread SizeM14 x 1.25
Spanner Size20.8 mm
Thread Length [mm]19.0 mm
Spark Position [mm]3.0 mm

OE/OEM numbers (221)

Search by this OE number to find compatible parts

Where this part fits

Original-fit position for OE 0046759688. The red ring marks where this part installs on the vehicle.

PART — Others
OthersPosition main

About this product

NGK spark plug (6637) fires the air-fuel charge with a precisely controlled spark at the correct electrode gap and heat range for your engine's combustion chamber geometry. Plug parameters — Thread Size: M14 x 1, 25, Spanner Size: 20, 8 mm, Spark Plug: 52, Spark Plug: 55 — determine ignition timing accuracy, electrode longevity, and resistance to pre-ignition deposits across the full RPM range. Thread reach, seat type, and hex size are specified to fit ALFA ROMEO, ASTON MARTIN, AUDI, AUSTIN and 53 other makes cylinder heads without re-gapping or thread chasing. Replaces OE ignition references: 0000-18-1690, 0 001 330 104, 0001335702, 0001335714 and 566 more. NGK ignition components are manufactured to SAE and DIN specifications and are approved for use in vehicles covered by manufacturer service agreements throughout Europe. Standard copper-core spark plugs last around 20,000–30,000 miles, while iridium or platinum-tipped plugs can last 60,000–100,000 miles — always follow the interval specified in your vehicle's service schedule. Symptoms of worn spark plugs include rough idling, engine misfires (often felt as a stumble under acceleration), increased fuel consumption, and difficulty starting in cold weather. Spark plug replacement is a straightforward DIY job on most engines — you need a spark plug socket, a torque wrench, and a gap gauge; allow 30–60 minutes for a four-cylinder engine, longer for boxer or V-configurations where access is tighter. Always match the heat range and electrode material specified by your engine manufacturer — fitting a plug with the wrong heat range can cause pre-ignition, fouling, or catalytic converter damage. Replacing spark plugs on schedule maintains optimal combustion efficiency, reduces harmful emissions, and prevents unburnt fuel from damaging the catalytic converter — a component that costs many times more to replace. Every part is dispatched from our UK warehouse with a 30-day money-back guarantee and free hassle-free returns.

About NGK

NGK Spark Plug Co., founded in 1936 in Nagoya, Japan, is the world's largest manufacturer of spark plugs and a major producer of oxygen sensors. NGK specialises in spark plugs, glow plugs, ignition coils, and lambda sensors for petrol and diesel engines. As the OE supplier to the majority of global car manufacturers, NGK products deliver reliable ignition and precise emissions control. Trusted in Formula 1 and everyday motoring, NGK is the benchmark for ignition system quality and performance.

Suitable cars

Equivalent products (200)

Show all 200 OE numbers
ACDelco41-4XLS
ACDelco41-601
ACDelco42XLS
ACDelco43XLS
ACDelcoC42CXLS
ACDelcoC43CXLS
ACDelcoCR42CXLS
ACDelcoCR43CXLS
ACDelcoR42CXLS
ACDelcoR42XLS
ACDelcoR43CXLS
ACDelcoR43XLS
AMG002 159 24 03
AMG002 159 28 03
AMG002 159 41 03
AMG002 159 42 03
AMG003 159 12 03
AMG003 159 13 03
AMG003 159 45 03
AMG003 159 57 03
AMGA 002 159 24 03
AMGA 002 159 28 03
AMGA 002 159 41 03
AMGA 002 159 42 03
AMGA 003 159 12 03
AMGA 003 159 13 03
AMGA 003 159 45 03
AMGA 003 159 57 03
BOM-Prestolite14G22
BOM-Prestolite14 GR 22
BorgWarner (BERU)0 001 330 104
BorgWarner (BERU)0001335702
BorgWarner (BERU)0001335714
BorgWarner (BERU)0001335737
BorgWarner (BERU)0001340702
BorgWarner (BERU)0 001 340 704
BorgWarner (BERU)0001340707
BorgWarner (BERU)0001340903
BorgWarner (BERU)0 001 345 704
BorgWarner (BERU)0002335701
BorgWarner (BERU)0002340701
BorgWarner (BERU)14-5 DTU
BorgWarner (BERU)14-6D
BorgWarner (BERU)14-6D1
BorgWarner (BERU)14-6 DP0
BorgWarner (BERU)14-6DPO
BorgWarner (BERU)14-6 DTU
BorgWarner (BERU)14-6DU
BorgWarner (BERU)14-6 DU0
BorgWarner (BERU)14-6DUO
BorgWarner (BERU)14-7D
BorgWarner (BERU)14-7DU
BorgWarner (BERU)14-7 DU0
BorgWarner (BERU)14-7DUO
BorgWarner (BERU)14 G-8 DTU
BorgWarner (BERU)14R-6D
BorgWarner (BERU)14R-6DU
BorgWarner (BERU)14R-7D
BorgWarner (BERU)14R-7DU
BorgWarner (BERU)175/14/3A
BorgWarner (BERU)200/14/3A
BorgWarner (BERU)215/14/3A
BorgWarner (BERU)D 200/14/3A
BorgWarner (BERU)D200/14/3A
BorgWarner (BERU)RS 35
BorgWarner (BERU)RS35
BorgWarner (BERU)Z 104
BorgWarner (BERU)Z 11
BorgWarner (BERU)Z 20
BorgWarner (BERU)Z 22
BorgWarner (BERU)Z 27
BorgWarner (BERU)Z 44
BorgWarner (BERU)Z 50
BorgWarner (BERU)Z 51
BorgWarner (BERU)Z 61
BorgWarner (BERU)Z 62
BOSCH0 241 235 099
BOSCH0241235103
BOSCH0 241 235 563
BOSCH0 241 235 602
BOSCH0241235693
BOSCH0241235705
BOSCH0 241 235 755£2.99
BOSCH0241240057
BOSCH0241240058
BOSCH0 241 240 530
BOSCH0 241 240 539
BOSCH0 241 240 611£3.99
BOSCH0 241 243 501
BOSCH0241243501
BOSCH0 242 235 511
BOSCH0 242 235 525
BOSCH0242235525
BOSCH0 242 235 529
BOSCH0 242 235 537
BOSCH0 242 235 541
BOSCH0242235541
BOSCH0 242 235 630
BOSCH0 242 235 663£2.99
BOSCH0 242 235 909£11.99
BOSCH0 242 235 930
BOSCH0 242 240 511
BOSCH0 242 240 516
BOSCH0242240516
BOSCH0 242 240 521
BOSCH0 242 240 579
BOSCH0 242 240 592£3.99
BOSCH0 242 240 849£11.99
BOSCH+1
BOSCH+12
BOSCHF 000 KE0 P34
BOSCHW 175 T30
BOSCHW 175 TR30
BOSCHW 200 T27
BOSCHW 200 T30
BOSCHW 200 TR30
BOSCHW 215 T30
BOSCHW 220 T30
BOSCHW 6 D
BOSCHW 6 D1
BOSCHW 6 DC
BOSCHW6DC0
BOSCHW 6 DCO
BOSCHW 6 DP
BOSCHW 6 DP0
BOSCHW6DP0
BOSCHW 6 DPO
BOSCHW7D
BOSCHW 7 D0
BOSCHW 7 DC
BOSCHW7DC0
BOSCHW 7 DCO
BOSCHW 7 DCR
BOSCHW 7 DP
BOSCHW 7 DSR
BOSCHW 7 DT
BOSCHWR 6 D
BOSCHWR 6 D+
BOSCHWR 6 DC
BOSCHWR 6 DC+
BOSCHWR6DC+
BOSCHWR 6 DP
BOSCHWR 6 DS
BOSCHWR6DS
BOSCHWR 7 D
BOSCHWR 7 D+
BOSCHWR 7 DC
BOSCHWR 7 DC+
BOSCHWR7DC+
BOSCHWR 7 DC2
BOSCHWR 7 DP
BOSCHWR7DP
BOSCHWR 7 DS
BOSCHWR7DS
BRISKL 15 Y
BRISKL 15 YC
BRISKLR 15 YC
BRISKLR 15 Z
CHAMPION2332
CHAMPIONCCH4151
CHAMPIONEON5
CHAMPIONEON 5 /286
CHAMPIONN 10 PY
CHAMPIONN10PY
CHAMPIONN10Y
CHAMPIONN281YC
CHAMPIONN66Y
CHAMPIONN 6 BYC
CHAMPIONN79Y
CHAMPIONN 7 BMC
CHAMPIONN 7 BYC
CHAMPIONN89GY
CHAMPIONN 8 GY
CHAMPIONN8GY
CHAMPIONN8Y
CHAMPIONN 9 BYC
CHAMPIONN9Y
CHAMPIONN9YC
CHAMPIONN9YCC
CHAMPIONN9YCX
CHAMPIONOE001
CHAMPIONOE 001 R/04
CHAMPIONOE001/R04
CHAMPIONOE001/T10
CHAMPIONOE004
CHAMPIONOE 004 /B04
CHAMPIONOE004/R04
CHAMPIONOE004/T10£3.99
CHAMPIONOE006
CHAMPIONOE 006 /B04
CHAMPIONOE006/R04
CHAMPIONOE006/T10£4.99
CHAMPIONOE 012
CHAMPIONOE 012/R04
CHAMPIONOE 012/T10
CHAMPIONOE022
CHAMPIONOE022/T10
CHAMPIONOE 044
CHAMPIONOE 044/T10
CHAMPIONOE 095

Spark Plug NGK 6637 — compatible car models

Car modelsALFA ROMEO: 145 (930), 146 (930), 155 (167), 164 (164), 166 (936), 33 (905), 33 (907), 33 Sportwagon (905), 33 Sportwagon (907), 75 (162) (+12 more); ASTON MARTIN: DBS Vantage, LAGONDA I, LAGONDA I Shooting Brake; AUDI: 100 C1 Saloon (801, 803, 805, 807, 811, 813, F104), 100 C2 Avant (435, 436), 100 C2 Saloon (431, 433, 434), 100 C3 Avant (445, 446), 100 C3 Saloon (443, 444)
Engines1.4 i.e. (930.A3); 1.4 i.e. (930.B3); 2.0 16V Turbo Q4 (167.A2B, 167.A2C, 167.A2E); 2.5 V6 (164A1C); 2.0 V6 (936A3); 1.3 (905A1); 1.2 (907A4); 1.4 (905A1H); 1.4 i.e. 4x4 (907B3); 1.6 (162B2); 1.8 (162A1); 1.2 (901.D0, 901.D1); 1.2 (904A); 1.3 (902A); 1.6 (116.B1A) (+12 more)
Year of manufacture1962-2007
Manufacturer article number (MPN)6637
OE part numbers0000-18-1690, 002 159 24 03, 002 159 28 03, 002 159 41 03, 002 159 42 03, 00259-18110, 003 159 12 03, 003 159 13 03, 003 159 45 03, 003 159 57 03, 0046759688, 0222-18-110, 0259-18-110, 0370-18-110, 04195-34150, 04886 206, 09482-00118, 09482-00177, 09482-00299, 09482-00392 (+201 more)
Compatibility check

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Description and what's included

NGK 6637 Iridium IX. Spanner Size: 20,8 mm. Spark Plug: 11. Spark Plug: 28. Spark Plug: 37. Spark Plug: 52. Spark Plug: 55. Spark Position [mm]: 3,0 mm. Thread Length [mm]: 19,0 mm

What's included:
  • 1x Spark Plug
Shipping, returns, warranty

Free UK delivery on orders over £99.00. Express and standard shipping available.

  • Standard delivery: 2-5 business days
  • Express delivery: 1-2 business days
  • Free returns within 14 days
  • All parts backed by manufacturer warranty

Warranty: 12-month manufacturer warranty on all parts. 14-day money-back guarantee if the part doesn't fit your vehicle.

Frequently Asked Questions

Is this Spark Plug compatible with my car?

This Spark Plug fits ALFA ROMEO, ASTON MARTIN, AUDI, AUSTIN, AUTOBIANCHI and 52 more vehicles. Use the vehicle selector at the top of the page to check exact compatibility — enter your car's make, model, and engine for a confirmed fitment match. All fitment data is verified through TecDoc.

What specifications does this NGK Spark Plug have?

This NGK Spark Plug has the following specifications: Thread Size: M14 x 1,25; Spanner Size: 20,8 mm; Spark Plug: 52; Spark Plug: 55; Spark Plug: 11; Spark Plug: 37. Check the full specifications table above for complete details.

What OE part numbers does this Spark Plug replace?

This Spark Plug replaces OE part numbers: 0000-18-1690, 002 159 24 03, 002 159 28 03, 002 159 41 03, 002 159 42 03, 00259-18110, 003 159 12 03, 003 159 13 03 and 213 more. Cross-reference these numbers with your vehicle's original part number to confirm compatibility.

How much does a Spark Plug cost?

This NGK Spark Plug is available for £16.99. Spark Plug prices vary depending on brand, specifications, and vehicle compatibility. NGK parts offer a balance of quality and value, backed by our 14-day money-back guarantee.

How do I know when to replace my Spark Plug?

Signs include rough idling, difficulty starting, engine misfires, increased fuel consumption, or lack of acceleration. Most spark plugs should be replaced every 30,000-60,000 miles for copper, or 60,000-100,000 miles for iridium/platinum.

What tools do I need to replace a Spark Plug?

Tools needed: spark plug socket (16mm or 21mm, with rubber insert), torque wrench (20-30 Nm typical -- check vehicle spec), ratchet with 3-inch extension, feeler gauge for gap check, anti-seize compound. Difficulty: Moderate DIY. Safety warning: Allow the engine to cool fully before removing plugs. Over-torquing will strip aluminium cylinder head threads -- always use a torque wrench.

Can I use this part as a replacement for OE 0000-18-1690?

Yes, this NGK Spark Plug is a direct replacement for OE part number 0000-18-1690. It is manufactured to meet or exceed original equipment specifications, ensuring proper fitment and performance. All cross-reference data is verified through TecDoc.

Is the NGK 6637 the same as the NGK 0005?

No, while both are Spark Plug parts, they are different products. The NGK 6637 has Thread Size: M14 x 1,25, Spanner Size: 20,8 mm, Spark Plug: 52. The NGK 0005 may differ in dimensions, fitting position, or material composition. Always verify compatibility with your specific vehicle using our vehicle selector, or contact our customer service team for assistance.

More NGK parts

Related categories

Common OE numbers for this part

Common original equipment numbers linked to stocked alternatives.

Related guides

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