NGK Iridium BKR7EIX Spark Plug M14x1.25

NGK BKR7EIX Iridium Spark Plug Specifications

Whatever your use or engine set-up, the correct choice of spark plug is very important. Iridium is very heavy and dense metal, ensuring that NGK spark plugs have a longer lifespan than OEM ones, withstanding more than 100.000 km in standard use.

Which heat range to choose ?

If the letters (for example BKR-EIX) indicate the spark plug's shape and thread size, the numbers (from 7 to 9) indicate the heat range, basically meaning how well the spark plug can operate in intense conditions. The higher the number, the more the spark plug will be "cold", and more adapted to tuned engines and sporty use. A cold spark plug is designed to operate at higher than average temperatures and disperse the heat inside the cylinders, improving combustion, performances and engine reliability, reducing the risk of detonation.

However, make sure you only fit cold spark plugs if your car requires them, otherwise you could encounter problems such as difficult cold starts and rough idling. Also, do not install cold spark plugs if your engine runs on E85 fuel. In short :

• BKR7EIX : one grade colder than standard, for lightly tuned or sporty engines, used both on the road or the track
• BKR8EIX : two grades colder than standard, for tuned and powerful engines used mainly on the track
• BKR9EIX : three grades colder than standard, for high power and heavily modified engines used in intense conditions

Application List

Non-exhaustive list.

• Alfa Romeo GTA and other V6
• Alpine A610 3.0L Turbo
• Aston Martin DB7 (AJ6HT)
• Audi engines : 1.8T & 2.0, GTI, FSI, TFSI, V6... (A3, A4, A5, A6, A7, A8, Q3, Q7, Quattro 20V, R8, TT, RS4, RS6, S4, S6...)
• BMW 1-Series E8X : 116i, 118i, 120i (N45, N46)
• BMW 3-Series E30 : 316i, 318i (M40, M42, M43)
• BMW 3-Series E36 : 316i, 318i, 320i, 323i, 325i, 328i (M40, M42, M43, M50, M52)
• BMW 3-Series E46 : 316i, 318i, 320i, 323i, 325i, 328i, 330i (M43, N40, N42, N43, N45, N46, M52, M54)
• BMW 3-Series E9X : 316i, 318i, 320i (N45, N46)
• BMW 5-Series E28 : 520i (M20)
• BMW 5-Series E34 : 518i, 520i, 525i, 530i, 540i (M40, M50, M60)
• BMW 5-Series E39 : 520i, 523i, 525i, 528i, 530i, 535i, 540i, M5 (M52, M54, M62, S62)
• BMW 5-Series E6X : 520i, 525i, 530i, 540i, 545i, 550i (N62, N73, M54)
• BMW 6-Series E6X : 645i, 650i (N62, N73, M54)
• BMW 7-Series E32 : 730i, 740i, 750i (M60)
• BMW 7-Series E38 : 728i, 730i, 735i, 740i (M52, M60, M62)
• BMW 7-Series E6X : 730i, 735i, 740i, 745i, 750i, 760i (N62, N73, M54)
• BMW 8-Series E31 : 840i, 850i (M60, M62, S70)
• BMW X1 E84 : 1.8i (N46)
• BMW X3 E83 : 2.0i, 2.5i, 3.0i (N46, M54)
• BMW X5 E53 : 3.0i, 4.4i, 4.6i, 4.8i (N62, M62, M54)
• BMW X5 E70 : 4.8i (N62)
• BMW Z3 : 1.8i, 1.9i, 2.0i, 2.2i, 2.8i, 3.0i (M43, M44, M52, M54)
• BMW Z4 E85 & E86 : 2.0i, 2.2i, 2.5i, 3.0i (N46, M54)
• BMW Z8 (S62)
• Caterham 21 1.6L
• Caterham Super Seven 1.4L & 1.6L
• Citroën AX GT, GTI (TU3FJ2)
• Citroën C2 1.4
• Citroën Saxo 1.4i, 1.6i, 1.6i 16V VTS (TU5J4)
• Citroën Xsara 1.4i, 1.6i, 1.8i, 1.8i 16V, 1.9i, 2.0i, 2.0i 16V
• Citroën ZX 1.4i, 1.6i, 1.8i, 1.8i 16V, 1.9i, 2.0i, 2.0i 16V
• Daihatsu Copen 1.3L (K3-VE)
• Fiat Barchetta
• Fiat Bravo, Brava 1.6 16V, 1.8 16V GT, 2.0 20V HGT
• Fiat Cinquecento, Seicento 900i, 1.1i Sporting, Abarth
• Fiat Coupé 1.8, 2.0 16V, 2.0 20V, Turbo
• Fiat Punto GT Turbo ie 1.4, 1.8 16V HGT
• Fiat Stilo 1.6 16V
• Fiat Uno 1.4 Turbo ie
• Ford Escort Cosworth (N5F)
• Ford Fiesta 1.6 XR2i, 1.6 16V
• Ford Sierra Cosworth (N5C, N5D)
• Honda Civic, B16 engines (EE9, EG6, EK4)
• Honda CRX, B16 engines (EE8)
• Honda DelSol, B16 engines (EG2)
• Honda Integra Type R (B18C6)
• Honda Legend, C30, C32 engines/li>
• Honda NSX (C32)
• Honda S2000 (F20, F22)
• Hyundai Coupé (96-09)
• Jaguar XK8
• Jaguar XKR
• Lamborghini Gallardo
• Lexus GS300 (2JZ-GE)
• Lexus IS300 (2JZ-GE)
• Lotus 2 Eleven
• Lotus Elan
• Lotus Elise
• Lotus Esprit
• Lotus Europa
• Lotus Exige
• Maserati Ghibli 3.0S Q4
• Mazda 323 Turbo
• Mazda MX-3 (all)
• Mazda MX-5 NA & NB (B6-ZE, BP-ZE)
• Mazda MX-6 2.0L (FS-19)
• Mercedes A-Class A45 AMG
• Mercedes C-Class S202 (96-01) C43 AMG
• Mercedes C-Class S203 (01-07) C32 AMG
• Mercedes C-Class S203 (01-07) C55 AMG
• Mercedes C-Class W202 (93-00) C36 AMG
• Mercedes C-Class W202 (93-00) C43 AMG
• Mercedes C-Class W203 (00-07) C32 AMG
• Mercedes C-Class W203 (00-07) C55 AMG
• Mercedes E-Class W210 (95-02) E50 AMG
• Mercedes CLK A209 (03-10) 55 AMG
• Mercedes CLK C208 (97-02) 55 AMG
• Mercedes SL R129 (89-01) 55 AMG
• Mercedes SLK R170 (96-04) 32 AMG
• Mercedes SLK R171 (04-11) 55 AMG
• Mitsubishi 3000 GT (6G72)
• Nissan 100NX (SR20DE, GA16DE)
• Nissan 180SX S13 (SR20DET)
• Nissan 200SX S14, S14A (SR20DET)
• Nissan Primera GT (SR20DE)
• Nissan Skyline (RB25DET)
• Nissan Sunny / Pulsar GTI-R (SR20DET)
• Opel Astra G, 1.4 16V, 1.6, 1.6 16V, 1.8 16V, 2.0 16V, 2.2 16V Ecotec, Turbo, OPC
• Opel Calibra 2.0i GT, 2.0i 16V
• Opel Corsa B 1.4i, 1.4i 16V, 1.6i 16V, GSi
• Opel Corsa C 1.4 16V, 1.8 Gsi 16V
• Opel Corsa D OPC
• Opel Speedster 2.0L & 2.0 Turbo (Z20LET)
• Opel Tigra 1.4i 16V, 1.6i 16V
• Peugeot 106 1.3 Rallye, 1.4i, 1.6i, 1.6 Rallye, 1.6 S16, GTi (TU5J4)
• Peugeot 205 1.3 Rallye (TU24), 1.6i XS, 1.6i GTi, GT, 1.9 GTi
• Peugeot 206 1.4, 1.6
• Peugeot 306 1.8i 16V, 2.0 XSi, 2.0 16V, 2.0 S16
• Peugeot 309 1.9 GTi, 1.9 GTi 16S
• Peugeot 405 1.9 Mi 16, X4, 2.0 Mi 16, 2.0 T16
• Peugeot 406 Coupé 2.0 16V
• Porsche Boxster before 2009
• Porsche 964
• Porsche 993
• Porsche 996
• Porsche 997 before 2008
• Porsche Carrera GT
• Porsche Cayenne
• Porsche Cayman before 2009
• Renault 19 16S 1.8
• Renault Clio I 16S 1.8, Williams 2.0 16S
• Renault Clio II 1.4 16V, 1.6, 1.6 16V
• Renault Clio II RS (F4R)
• Renault Megane I 1.4 16V, 1.6e, 1.6 16V, 1.8 16V, 2.0e 16V
• Renault Megane II RS (F4R)
• Renault Megane III RS (F4R)
• Renault Safrane Biturbo (Z7X)
• Renault Spider 2.0 16V
• Seat engines : 1.8T & 2.0, GTI, FSI, TFSI, V6... (Alhambra, Altea, Ibiza, Cupra, Leon, Toledo...)
• Subaru Forester before 2005 (EJ20, EJ22, EJ25)
• Subaru Impreza before 2005 (EJ20, EJ22, EJ25)
• Subaru Legacy before 2005 (EJ20, EJ22, EJ25)
• Suzuki Swift Sport ZC31 (M16A)
• Toyota Aristo (2JZ-GE, 2JZ-GTE)
• Toyota Celica, inc. GT-Four (3S-GE, 3S-GTE, 2ZZ-GE, 1ZZ-FE, 7A-FE)
• Toyota Chaser (1JZ-GE, 1JZ-GTE)
• Toyota Cresta (1JZ-GE, 1JZ-GTE)
• Toyota Corolla 1.4 16V, 1.6 16V, 1.6 16V VVT-i, 1.8 16V VVT-i after 2000 (2ZZ-GE, 1ZZ-FE)
• Toyota Mark II (1JZ-GE, 1JZ-GTE)
• Toyota MR-2 SW20, inc. turbo (3S-GE, 3S-GTE)
• Toyota MR-S (1ZZ-FE)
• Toyota Supra MK4 (2JZ-GE, 2JZ-GTE)
• Toyota Yaris, inc. TS 1.3 16V, 1.5 16V VVT-i
• TVR Cerbera
• Volkswagen engines : 1.8T et 2.0, GTI, FSI, TFSI, V6, VR6... (Corrado, Golf 3 VR6, Golf 4, Golf 5, Golf 6, Passat, Polo GTI, Scirocco...)