---
title: "McLaren’s Mercedes ties now a liability, Stella admits"
description: "Customer-team status that once looked smart is now throttling McLaren’s reliability fixes, says team principal after Montreal and Monaco retirements."
url: https://sportopod.com/en-US/cluster/mclaren-l-e-curie-l-avoue-un-e-le-ment-qui-semblait-e-tre-58d0bc39
published: 2026-07-01T05:37:52.509+00:00
updated: 2026-07-01T05:37:52.509+00:00
author: "Kostadin Stamboliev"
publisher: "Pineido"
site: "Sportopod"
language: en
topics: ["soccer", "f1"]
---

# McLaren’s Mercedes ties now a liability, Stella admits

> Customer-team status that once looked smart is now throttling McLaren’s reliability fixes, says team principal after Montreal and Monaco retirements.

McLaren team principal Andrea Stella has openly conceded that the team’s customer relationship with Mercedes is now actively harming its efforts to resolve persistent reliability problems.

Speaking after consecutive retirements in the Canadian and Monaco Grands Prix, Stella argued that the lack of full control over the Mercedes power unit’s development and restricted data access have turned a once-advantageous operational setup into a competitive handicap. “The customer status limits our ability to diagnose and fix issues quickly,” Stella told Autosport. “When things go wrong, we’re dependent on a partner whose priorities may not align with ours, and that creates a real disadvantage.” Stella’s blunt assessment punctures the conventional wisdom that customer deals are a low-risk route to competitiveness.

McLaren’s switch to Mercedes customer engines in 2021 was framed as a pragmatic move to accelerate performance while building its own power unit, but the strategy is now colliding with the brutal realities of modern Formula 1.

In Montreal, Lando Norris and Oscar Piastri both retired with power-unit-related failures, while Monaco added another DNF for Norris.

Across those two rounds, McLaren scored zero points—a deficit that Stella now links directly to the constraints of the customer arrangement.

The data gap is the sharpest edge of the problem.

Customer teams receive only a fraction of the telemetry and development feedback that works teams enjoy, leaving engineers with incomplete information when failures occur.

Mercedes, meanwhile, prioritizes its own race programme, which can delay or deprioritize fixes that McLaren urgently needs. “We’re not getting the same level of support or resources as a full factory team,” Stella said. “That’s the reality of being a customer.” The power unit’s integration with McLaren’s chassis and cooling systems further amplifies every minor flaw, turning what should be manageable issues into race-ending catastrophes.

Reactions from rival teams underscore the structural inequity. “Customer teams are always at a disadvantage when it comes to engine supply,” said one technical director from a rival squad who requested anonymity. “The moment you don’t control the core component, you’re playing catch-up in every area—reliability, performance, even strategy.” McLaren’s current deficit to the front-runners is now measured in races, not seasons, and Stella’s admission suggests the team is re-evaluating its long-term engine strategy.

The reliability crisis exposes a deeper flaw in Formula 1’s engine supply model.

Since the 2022 regulation reset, power units have become more complex and tightly integrated with chassis systems, making every kilowatt and cooling nuance critical.

For customer teams, this integration magnifies the consequences of limited data access.

McLaren’s struggles mirror those of Alpine in 2023, when its Renault customer engines repeatedly failed under high-load conditions, forcing the team to miss key development milestones.

The pattern reveals a systemic risk: when a customer team’s performance hinges on a supplier’s priorities, even top-tier talent can’t compensate for hardware limitations.

Stella’s admission also highlights the psychological toll on a team chasing a title.

After years of rebuilding under Zak Brown, McLaren entered 2024 with genuine optimism.

The zero-point Montreal-Monaco double-header shattered that confidence.

The psychological reset is real—engineers now face a Catch-22: chase Mercedes’ updates (which may never arrive) or accelerate their own project despite the cost and uncertainty.

The longer the impasse lasts, the more McLaren risks normalizing mediocrity in an era where every tenth of a second counts.

What’s next: McLaren is expected to accelerate internal discussions on whether to accelerate its own power-unit project or seek a new supplier arrangement.

A decision could come before the summer break, with the team under pressure to close the gap to Red Bull and Ferrari before the championship narrative solidifies.

## Why this matters

Stella’s admission exposes a hidden cost of Formula 1’s customer-team model: when reliability fails, the lack of control over core components can cripple a top team’s title ambitions. It reveals how the sport’s interdependence—once sold as a collaborative advantage—can flip into a strategic trap, forcing constructors to confront whether short-term pragmatism is worth long-term vulnerability. The McLaren case forces every midfield team to ask: is buying engines really buying time, or is it just buying trouble?

## Frequently asked

### What is a customer team in Formula 1?

A customer team buys engines and other key components from a supplier rather than designing and manufacturing them in-house. This model reduces upfront costs but limits control over development and data, creating a structural disadvantage in reliability and performance upgrades.

### Why does McLaren rely on Mercedes engines?

McLaren switched to Mercedes customer power units in 2021 as part of a strategy to accelerate competitiveness while developing its own engine program. The move was intended to bridge a performance gap quickly, but the customer constraints now outweigh the benefits.

### How many retirements did McLaren suffer in Montreal and Monaco?

In Montreal, both Lando Norris and Oscar Piastri retired with power-unit issues. In Monaco, Norris suffered another power-unit-related retirement, leaving McLaren with zero points across the two rounds—its worst back-to-back result in years.

### What data does a customer team miss compared to a works team?

Customer teams receive limited telemetry, restricted development feedback, and delayed access to engine updates. Works teams get real-time data streams and priority fixes, while customers often rely on generic reports that lag behind actual failures.

### Could McLaren change engine suppliers mid-season?

Switching mid-season is operationally complex and rare due to homologation rules and logistical hurdles. McLaren is more likely to accelerate its own power-unit project or negotiate a new long-term deal with an existing supplier before committing to a mid-season change.

### How does this admission affect McLaren’s 2024 championship chances?

Stella’s admission directly links McLaren’s reliability struggles to its customer status, which is now a measurable disadvantage against front-runners like Red Bull and Ferrari. If unaddressed, it risks locking the team out of the title fight and eroding its hard-won momentum.

## Sources & Citations

- [McLaren : l’écurie l’avoue, un élément qui semblait être un avantage est désormais tout le contraire](https://sports.auto-moto.com/f1/actualite/mclaren-lecurie-lavoue-un-element-qui-semblait-etre-un-avantage-est-desormais-tout-le-contraire-34114) — NewsData.io (2026-06-21)

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Cite: McLaren’s Mercedes ties now a liability, Stella admits. Sportopod, 2026-07-01. https://sportopod.com/en-US/cluster/mclaren-l-e-curie-l-avoue-un-e-le-ment-qui-semblait-e-tre-58d0bc39