1990 Mazda 626 BaseFACTORY OEM SERVICE PROCEDURE

Spark Plugs

SPARK PLUG TYPE

Application Plug Type (NGK)
B2200
Carbureted BPR5ES or BPR6ES
Fuel-Injected BPR5ES-11 or BPR6ES-11
B2600i ZFR5F-11 or ZFR6F-11
Miata BKR5E-11, BKR6E-11 or BKR7E-11
MPV ZFR5F-11 or ZFR6F-11
MX-6 & 626 ZFR5F-11, ZFR6F-11 or ZFR7F-11
Protege
DOHC BKR5E-11, BKR6E-11 or BKR7E-11
SOHC BKR5E-11 or BKR6E-11
323 BKR5ES-11 or BKR6ES-11
(1) RX7
Leading BUR7EQ
Trailing BUR9EQ
929
DOHC ZFR5F-11 or ZFR6F-11
SOHC ZFR5F-11, ZFR6F-11 or ZFR7F-11
(1) See Fig 1.
SPARK PLUG SPECIFICATIONS

Application Gap In. (mm) Torque Ft. Lbs. (N.m)
B2200 (Carbureted) .031 (.80) 13 (18)
RX7 (1) .055 (1.3) 11 (15)
All Others .041 (1.0) 13 (18)
(1) Side gap type spark plug. See Fig 1.
Fig 1: Identifying Leading & Trailing Spark Plug & Gap
G00274639Courtesy of MAZDA MOTORS CORP.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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