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BMW Part# 13721707050
Price for FRAM CA4521 is $10.00 Price for LX343 is $15.00
Local pick-up in Brick or Clifton preferred
Will ship and accept PayPal and Venmo
Part 13721715881 was found on the following vehicles:
3' E30 (12/1981 — 02/1994)
3' E36 (12/1989 — 07/2000)
5' E28 (06/1980 — 01/1989)
5' E34 (06/1987 — 06/1996)
7' E32 (11/1986 — 03/1994)
8' E31 (07/1989 — 05/1999)
Z1 Roadster (07/1988 — 06/1991)
The LX343 most commonly refers to the MAHLE Original LX 343 Air Filter, a high-quality engine air filter primarily used in BMW vehicles from the 1990s through the mid-2000s.
1. MAHLE Original LX 343 Air Filter This is a standard flat-panel air filter designed to meet OEM specifications for performance and engine protection.
Vehicle Compatibility: Fits various BMW models including:
3 Series: 320i, 323i, 325i, 328i, 330i, and M3 (E36 and E46 chassis).
5 Series: 525i, 528i, and 530i (E39 chassis).
Z Series: Z3 and Z4 (early models).
Performance Features:
Captures 99.9% of dust, soot, and tire wear particles. Features resin-impregnated filter paper to resist water and chemicals. Designed for a high dirt-holding capacity and low pressure drop to maintain engine torque and fuel efficiency
compare these air filters ca4521 and lx343 Both the FRAM CA4521 and MAHLE LX 343 are engine air filters used for older BMW models, but they are not identical replacements for each other. While they overlap in some applications, the MAHLE LX 343 is a higher-grade OE (Original Equipment) replacement with broader compatibility for modern-classic BMWs.
Key Comparisons
Fram Air Filter CA4521 $11.43
mahle LX343 Air Filter $17.99
FRAM CA4521 Fitment BMW 3-Series (E30), 5-Series (E28/E34)
LX343 Fitment BMW 3-Series (E36/E46), 5-Series (E39), Z3, Z4, X3
JW100