2026-08-15 · 5 min read
BMW 1 Series Spark Plugs Malaysia — N20/B38/B48
F20 N20: 4 iridium plugs every 60,000 km. F40 B38 1.5T: 3 iridium plugs every 60,000 km (cheaper — only 3). F40 B48 2.0T: 4 plugs every 60,000 km. Malaysia cost: 4-cyl RM 200–400; 3-cyl RM 180–300. B38 3-cylinder — only 3 plugs to replace.
Plugs — 1 Series
- B38 (116i): 3 iridium plugs, 60,000 km, RM 150–280
- B48 (118i/120i): 4 iridium plugs, 60,000 km, RM 220–400
- N55 (M135i): 6 iridium plugs, 60,000 km, RM 400–700
- B38 3 plugs = cheapest plug service in BMW range
B38 3-Cylinder — Plug Quality Matters for Idle
The B38 3-cylinder already has a characteristic idle vibration. A worn or fouled spark plug makes this vibration significantly worse — owners sometimes think there is a fundamental engine problem when the fix is simply new plugs. At 60,000 km (or sooner if you notice rough idle), replace all three iridium plugs. The B38 3-plug replacement cost is the cheapest in our entire BMW range — just RM 150–280.