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SIB 11 07 23: Exhaust cracking
Exhaust cracking on B58/N63 engines (2023–2024); BMW explains the cause and the approved repair.
BMW emissions notice · NHTSA ID 11036377 · Aug 2026 · also written SI B11 07 23, B110723
What it covers
An emissions-related communication from BMW. Emissions parts may have longer federal or California warranty coverage.
The return springs on the exhaust camshaft followers (switchable rocker arm) may break.
Details
| Bulletin number | SIB 11 07 23 Also written: SI B11 07 23, B110723, 11 07 23, SIB-11-07-23, SI B110723 |
|---|---|
| NHTSA ID | 10242685, 10246222, 10249014, 10250744, 11000497, 11014420, 11036377 (revisions) |
| Document IDs filed | B110723 |
| Type | Emissions notice |
| Date | (first filed Aug 2023) |
| Models | 740i, ALPINA XB7, X5, X6, X7 |
| Model years | 2023–2024 |
| Chassis | G05, G06, G07, G70 |
| Engines | B58, N63 |
| Component (NHTSA) | Engine Engine And Engine Cooling Engine And Engine Cooling › Exhaust System |
Model, year and engine coverage comes from NHTSA's records. Not every car in this range is affected; the official document lists the exact production dates and conditions.
More for these cars
Related bulletins
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- SIB 11 06 25 Oil pump bolt torque check Oil pump bolt torque check on B58/N63 engines (2024); BMW repairs affected cars free under a service campaign. Service campaign · Aug 2025
- SIB 01 01 21 Thermostat warranty extension Thermostat warranty extension on BMW G05/G06/G07/G11 and other models (2016–2022); BMW extended the warranty on this part for eligible cars. Warranty extension · Nov 2024
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Before you pay, check the VIN for recalls. Some failures are covered by a safety recall or a BMW warranty extension.
Source: NHTSA Manufacturer Communications (public data). BimmerBench is not affiliated with BMW or NHTSA. The title and description above are our own plain-English summary; the full bulletin is BMW's document, linked above.