Used Mercedes-Benz GLA Brake Discs

The GLA changed generation in 2020, so both a 2015 and a 2019 car are first-generation (X156) models, which ran from 2014 to 2019 — meaning they share the same basic platform. However, whether the discs interchange depends on the engine size of each car, as larger-engined variants were often fitted with bigger brakes than smaller-engined ones. Confirm the engine sizes of both the donor and your car with the breaker against your registration before buying.

The second-generation GLA (H247) launched in 2020 and is a significantly different car from the first-generation X156 (2014–2019), so the brake discs are not expected to be interchangeable across that boundary. Even within each generation, disc size can vary depending on engine variant, so matching generation alone is not enough. Always confirm fitment against your specific registration with the breaker.

On the Mercedes-Benz GLA, trim levels like SE, Sport, AMG Line, and Urban Edition are primarily about cosmetic and equipment differences rather than changes to the braking hardware. What actually determines disc size is the engine variant — a 200, 220d, or 250 may run different-sized discs regardless of trim badge. Confirm the engine size of the donor part against your registration with the breaker to be sure.

No — the GLA 45 AMG is a high-performance variant with significantly more power, and it was fitted with larger, uprated brake discs to match. You should not assume discs from a standard GLA 200 or 220d will suit an AMG 45, or vice versa. Make sure any used discs you buy are sourced from a donor car with the same exact engine code and variant, and confirm with the breaker against your registration.

For brake discs, the side (NS — nearside/left, or OS — offside/right) generally matters less than for some other parts, as front discs and rear discs on the same axle are typically the same component on each side for the GLA. However, it is always worth mentioning which axle — front or rear — you need, as these are different sizes. Confirm with the breaker to be certain, particularly if your car has any unusual specification.

Not necessarily — brake disc size on the GLA is influenced by the power and weight of the specific engine variant rather than simply whether it is petrol or diesel. For example, a 220d and a 200 petrol may run different disc sizes even within the same X156 generation. Give the breaker both your registration and the donor car's registration so they can check the exact specification before you commit.