BMW F98 X4 M and X3 M (2020–2025): What Owners Replace First

The F98 X4 M and its F97 X3 M sibling (2020–2025) are the M division applied to a family SUV: the S58 twin-turbo six, adaptive M suspension and brakes sized for a car that weighs two tonnes. They are young enough that most repairs are still first-time repairs, and the list is different from an ordinary X3 — more heat, more load, more electronics. Here is what we see on the ones we part out.

1. The cooling package works for a living

The S58 runs a layered cooling system — engine, charge air, oil and transmission — and every circuit has its own lines and connectors. Oil cooler feed lines and transmission cooler hoses are the ones that seep first, especially on cars that have seen track days or towing. A weep at a fitting is worth catching early; the same leak on a hot manifold is a different kind of morning.

In stock · Kaufman, TXBMW F98 X4 M X3 M Engine Oil Cooler Feed Line — OEM$149.40View part →

2. Turbochargers and what they tell you

The S58 uses two turbos, front and rear, and they are not interchangeable. Before condemning one, check the charge pipes and the wastegate actuator — a boost fault is more often a leak or an actuator than a failed turbo. When a turbo does have to come off, buying the correct side matters more than the year on the badge.

In stock · Kaufman, TXBMW F98 X4 M Rear Turbocharger — OEM$398.40View part →

3. xDrive and the transfer case actuator

The M xDrive system splits torque through a transfer case with an electric actuator. When the actuator motor wears, the car throws a drivetrain warning and may default to a fixed split; the symptom looks alarming and the fix is often just the motor rather than the whole case. Worth diagnosing in that order.

In stock · Kaufman, TXBMW F98 X4M X3M ATC13-1 AWD Transmission Transfer Case 7889555 OEM 71k$747.00View part →

4. Sensors live where the parking knocks land

Radar, cameras and parking sensors sit in the bumpers and mirrors — exactly where a supermarket car park finds them. These are straight swaps with the right part, but they are equipment-specific and need calibration afterwards. A sensor from a differently-optioned car will fit the hole and refuse to code.

5. Interior trim is a real cost

Carbon trim sets, M seats and the M steering wheel are expensive new and hold their value used. If a car has been smoked in, sun-baked or had a seat torn, replacing the piece with a matching used part is usually the difference between a tired interior and a clean one. Match colour and material exactly — the M cars came in several combinations.

In stock · Kaufman, TXBMW F98 X4 M X3 M Steering Wheel with Paddle Shifters — OEM$452.35View part →

6. Buying used parts for a young M car

Because these cars are recent, part numbers changed mid-production more often than on older BMWs. Send us the VIN before you order: we check what your car was actually built with rather than what the model year suggests.

Looking for a part we do not have listed?

We part out X4 Ms as they come through the yard, so if you do not see your piece on the site yet, it may already be on the shelf. Send your VIN or call +1 (903) 914-0004 and we will match the exact OEM part for your BMW before you buy. For the standard X3, see our F25 X3 guide.