TSB: BMW 228I, 230I, 320I, 328D, 328I, 330E, 330I, 335I, 340I, 428I, 430I, 435I, 440I, ACTIVEHYBRID 3, M2, M235I, M240I (2012–2018)

Bulletin B520718 — December 1, 2018

Bulletin Details

Bulletin IDB520718
ManufacturerBMW
Models228I, 230I, 320I, 328D, 328I, 330E, 330I, 335I, 340I, 428I, 430I, 435I, 440I, ACTIVEHYBRID 3, M2, M235I, M240I
Model Years2012–2018
Date IssuedDecember 1, 2018
Date Added to NHTSAFebruary 25, 2019
ComponentSEATS
Vehicles Affected51 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

SEAT THIGH SUPPORT UPHOLSTERY IS PROTRUDING. The upholstery may dislodge slightly from the thigh support base over time from repeated compression due to normal use.

Affected Vehicles

MakeModelYearComponent
BMW 230I 2018 220000 SEATS
BMW 430I 2018 220000 SEATS
BMW 440I 2018 220000 SEATS
BMW M2 2018 220000 SEATS
BMW M240I 2018 220000 SEATS
BMW 230I 2017 220000 SEATS
BMW 320I 2017 220000 SEATS
BMW 328D 2017 220000 SEATS
BMW 330E 2017 220000 SEATS
BMW 330I 2017 220000 SEATS
BMW 335I 2017 220000 SEATS
BMW 340I 2017 220000 SEATS
BMW 430I 2017 220000 SEATS
BMW 440I 2017 220000 SEATS
BMW M2 2017 220000 SEATS
BMW M240I 2017 220000 SEATS
BMW 228I 2016 220000 SEATS
BMW 320I 2016 220000 SEATS
BMW 328D 2016 220000 SEATS
BMW 328I 2016 220000 SEATS
BMW 330E 2016 220000 SEATS
BMW 335I 2016 220000 SEATS
BMW 340I 2016 220000 SEATS
BMW 428I 2016 220000 SEATS
BMW 435I 2016 220000 SEATS
BMW M2 2016 220000 SEATS
BMW M235I 2016 220000 SEATS
BMW 228I 2015 220000 SEATS
BMW 320I 2015 220000 SEATS
BMW 328D 2015 220000 SEATS
BMW 328I 2015 220000 SEATS
BMW 335I 2015 220000 SEATS
BMW 428I 2015 220000 SEATS
BMW 435I 2015 220000 SEATS
BMW ACTIVEHYBRID 3 2015 220000 SEATS
BMW M235I 2015 220000 SEATS
BMW 228I 2014 220000 SEATS
BMW 320I 2014 220000 SEATS
BMW 328D 2014 220000 SEATS
BMW 328I 2014 220000 SEATS
BMW 335I 2014 220000 SEATS
BMW 428I 2014 220000 SEATS
BMW 435I 2014 220000 SEATS
BMW ACTIVEHYBRID 3 2014 220000 SEATS
BMW M235I 2014 220000 SEATS
BMW 320I 2013 220000 SEATS
BMW 328I 2013 220000 SEATS
BMW 335I 2013 220000 SEATS
BMW ACTIVEHYBRID 3 2013 220000 SEATS
BMW 328I 2012 220000 SEATS
BMW 335I 2012 220000 SEATS

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What Should You Do?

If your vehicle is affected by this TSB, contact your authorized BMW dealer. Bring this bulletin ID (B520718) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.